Husband in peruke, a politician once (4)
I believe the answer is:
whig
'a politician once' is the definition.
I can't tell whether this definition defines the answer.
'husband in peruke' is the wordplay.
'husband' becomes 'h'.
'in' means one lot of letters goes inside another.
'peruke' becomes 'wig' (I've seen this in another clue).
'h' going into 'wig' is 'WHIG'.
Can you help me to learn more?
(Other definitions for whig that I've seen before include "Member of a former reforming party" , "Old-style politician" , "Former 14 Down" , "Supporter of an old English political party" , "political operator" .)