Attempt retiring (3)

I believe the answer is:

shy

This clue is a double definition.

'attempt' is the first definition.
(thesaurus)

'retiring' is the second definition.
(thesaurus)

(Other definitions for shy that I've seen before include "Fling or throw" , "'Lacking self-confidence, timid (3)'" , "Throw in self-conscious way" , "Retiring; fling" , "Reticent" .)

I've seen this clue in The Times.

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