Playful trick frantically contained (5)
I believe the answer is:
antic
'playful' is the definition.
(thesaurus)
'trick frantically contained' is the wordplay.
'contained' says the answer is hidden in the clue.
'ANTIC' is hidden in the letters of 'trick frantically'.
(Other definitions for antic that I've seen before include "Frolic" , "Absurd action" , "Playful or mischievous act" , "Caper, trick" , "Caper; grotesque (arch.)" .)