Some shenanigans turning silly (5)
I believe the answer is:
inane
'silly' is the definition.
(I've seen this before)
'some shenanigans turning' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'turning' says the letters should be written backwards.
'enani' is hidden within 'shenanigans'.
'enani' back-to-front is 'INANE'.
(Other definitions for inane that I've seen before include "Absurd" , "Thick" , "Really stupid" , "Lacking sense, silly" , "Unintelligent" .)