A member of the opposition in Victorian times? (4)
I believe the answer is:
anti
'a member of the opposition' is the definition.
(I've seen this in another clue)
'in victorian times?' is the wordplay.
'in' says the answer is hidden in the clue.
'ANTI' is hidden within 'victorian times'.
(Other definitions for anti that I've seen before include "(Person who is) not in favour" , "Against, informally" , "Not in favor of" , "not favoured" , "'No' voter" .)