Intelligent leader of British Conservatives? (6)
I believe the answer is:
bright
'intelligent' is the definition.
(similar in meaning)
'leader of british conservatives?' is the wordplay.
'leader of' suggests taking the first letters.
'conservatives?' becomes 'right' (right-wing people).
The first letter of 'british' is 'b'.
'b'+'right'='BRIGHT'
(Other definitions for bright that I've seen before include "Mentally quick or radiating light" , "Intelligent; well-lit" , "Vivid - promising - smart" , "bubbly?" , "Intelligent, lively" .)