Keep playing part in west London area (5)
I believe the answer is:
acton
'london area' is the definition.
(I've seen this before)
'keep playing part in west' is the wordplay.
I cannot really see how this works, but
'playing' could be 'on' (on can mean playing or performing) and 'on' is found in the answer.
'part' could be 'act' (I have seen 'Part of play ' mean 'act' so perhaps 'part' could also mean 'act') and 'act' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for acton that I've seen before include "Gladstone's adviser" , "Respond in accordance with - London district" , "English statesman" , "London area" , "District of West London" .)