Play to a happy ending (3)

I believe the answer is:

toy

'play' is the definition.
('toy' can be a synonym of 'play')

'to a happy ending' is the wordplay.
'ending' indicates one should take the final letters.
The final letter of 'happy' is 'y'.
'to'+'y'='TOY'

(Other definitions for toy that I've seen before include "Miniature (dog)" , "Teddy or Dolly" , "One of spelt out words" , "Trifle with plaything?" , "Child's amusement" .)

I've seen this clue in the Evening Standard.

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