He was elected at the 1892 general election as a Member of Parliament for Portsmouth. Portsmouth's two MPs (one Liberal Unionist and one Conservative) had not stood for re-election, and Clough was one of the two Liberals elected to replace them.
He was re-elected in 1895, but did not serve a full term, and resigned his seat on 23 April 1900 by the technical device of accepting appointment as Steward of the Manor of Northstead, a notional "office of profit under The Crown". The by-election for his seat was held on 3 May 1900, and won by the Liberal candidate Thomas Bramsdon.
In the 1901 Census of London Clough is listed as a 54-year old Chartered Accountant & Auditor Magistrate and D L of the City of London living at Manor House, Upper Richmond Road, Barnes, Surrey with his wife Hannah and two sons.
- "House of Commons constituencies beginning with "P" (part 2)". Leigh Rayment's House of Commons page. Retrieved 2009-04-28.
- General Register Office index of births registered in October, November and December, 1846 - Name: Clough, Walter Owen District: Huddersfield Volume: 22 Page: 335.
- Craig, F. W. S. (1989) . British parliamentary election results 1885–1918 (2nd ed.). Chichester: Parliamentary Research Services. p. 171. ISBN 0-900178-27-2.
- "House of Commons debates". Hansard. 26 April 1900 vol 82 c19. Retrieved 2009-04-28. Check date values in:
- 1901 Census RG13/680 Folio 15, Page 21, Schedule 53: Richmond - Manor House, Upper Richmond Road, Barnes (Names and Surname: Clough, Walter O, Relation to Head of Family: Head, Condition of Marriage: M, Age last Birthday: 54, Profession or Occupation: Chartered Accountant & Auditor Magistrate D L of City of London, Where Born: Huddersfield, Yorkshire)
- General Register Office index of deaths registered in April, May and June, 1922 - Name: Clough, Walter O Age: 75 District: Kingston, Volume: 2A Page: 560.
- Hansard 1803–2005: contributions in Parliament by Walter Clough
|Parliament of the United Kingdom|
Sir Samuel Wilson
Sir William Crossman
|Member of Parliament for Portsmouth
1892 – May 1900
With: Sir John Baker
Sir John Baker
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