Drop male conservative in disgrace (7)
I believe the answer is:
modicum
'drop' is the definition.
(thesaurus)
'male conservative in disgrace' is the wordplay.
'male' becomes 'm' (common abbreviation).
'conservative' becomes 'C' (UK political abbreviation).
'in' is an insertion indicator.
'disgrace' becomes 'odium' (I've seen this in another clue).
'c' inserted inside 'odium' is 'odicum'.
'm'+'odicum'='MODICUM'
(Other definitions for modicum that I've seen before include "Moderate quantity" , "A small amount as of drink" , "touch" , "Tad" , "dash" .)