Divided Conservative and Labour? (5)
I believe the answer is:
cleft
'divided' is the definition.
(similar in meaning)
'conservative and labour?' is the wordplay.
'conservative' becomes 'C' (UK political abbreviation).
'and' means one lot of letters go next to another.
'labour?' becomes 'left' (I've seen this in other clues).
'c'+'left'='CLEFT'
(Other definitions for cleft that I've seen before include "Partially divided" , "Fissure; divided" , "Split or indentation" , "chasm" , "Split in the palate" .)