Crossword Genius

Left-wing member associated with Keir originally (4)

Ross

I believe the answer is:

pink

'left-wing' is the definition.
(I've seen this before)

'member associated with keir originally' is the wordplay.
'member' becomes 'pin' (pin is a kind of member).
'associated with' is a charade indicator (letters next to each other).
'originally' suggests taking the first letters.
The initial letter of 'keir' is 'k'.
'pin'+'k'='PINK'

(Other definitions for pink that I've seen before include "Comedy films involving a diamond, Inspector Clouseau and Peter Sellers" , "... similar flower - colour" , "Knock (of engine) - garden flower" , "(Shade of) flower" , "Left-wing" .)

I've seen this clue in The Independent.
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