Conservative and Labour deeply divided (5)
I believe the answer is:
cleft
'divided' is the definition.
(similar in meaning)
'conservative and labour deeply' is the wordplay.
'conservative' becomes 'C' (UK political abbreviation).
'and' says to put letters next to each other.
'labour deeply' becomes 'left' (I've seen this in other clues. I am not sure about the 'deeply' bit.).
'c'+'left'='CLEFT'
Can you help me to learn more?
(Other definitions for cleft that I've seen before include "Opening, fissure" , "rent" , "chasm" , "Narrow opening" , "Split (as a stick)" .)