Some shenanigans turned silly (5)
I believe the answer is:
inane
'silly' is the definition.
(thesaurus)
'some shenanigans turned' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'turned' is a reversal indicator.
'enani' is hidden in the letters of 'shenanigans'.
'enani' in reverse letter order is 'INANE'.
(Other definitions for inane that I've seen before include "Foolish, fatuous" , "Silly, fatuous" , "unimaginative" , "Lacking meaning" , "Fatuous, mindless" .)