Ungainly politician, one in luxurious environment (7)
I believe the answer is:
lumpish
'ungainly' is the definition.
(I've seen this before)
'politician one in luxurious environment' is the wordplay.
'politician' becomes 'MP' (Member of Parliament).
'one' becomes 'i' (Roman numeral).
'in' is an insertion indicator.
'luxurious environment' becomes 'lush' (I can't justify this - if you can you should give a lot more credence to this answer).
'mp'+'i'='mpi'
'mpi' placed inside 'lush' is 'LUMPISH'.
Can you help me to learn more?
(Other definitions for lumpish that I've seen before include "misshapen" , "Ungainly" .)