My acting's awfully athletic (9)

I believe the answer is:

gymnastic

'athletic' is the definition.
('gymnastic' can be a synonym of 'athletic')

'my acting's awfully' is the wordplay.
'awfully' is an anagram indicator.
'my'+'actings'='myactings'
'myactings' is an anagram of 'GYMNASTIC'.

(Other definitions for gymnastic that I've seen before include "Very agile" , "Involving exercises" .)

I've seen this clue in The Telegraph and The Daily Express.

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