Shakes a starlet badly (7)
I believe the answer is:
rattles
'shakes' is the definition.
(rattling is a kind of shaking)
'a starlet badly' is the wordplay.
'badly' is an anagram indicator.
'starlet' is an anagram of 'RATTLES'.
(Other definitions for rattles that I've seen before include "Noisy toys for babies" , "Starlet (anag)" .)
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