Taxi for a lean plotter? (8)
I believe the answer is:
cabalist
'plotter?' is the definition.
(I have seen 'Secret plotter ' mean 'cabalist' so perhaps 'plotter' could also mean 'cabalist')
'taxi for a lean' is the wordplay.
'taxi' becomes 'cab' (synonyms).
'for' means one lot of letters go next to another.
'lean' becomes 'list' (both can mean to tilt).
'cab'+'a'+'list'='CABALIST'
(Other definitions for cabalist that I've seen before include "Mystic scholar" , "Secret plotter" , "Jewish student" .)