Inactive Mike in rave after party (7)
I believe the answer is:
dormant
'inactive' is the definition.
(similar in meaning)
'mike in rave after party' is the wordplay.
'mike' becomes 'M' (phonetic alphabet: alpha, bravo, charlie etc.).
'in' indicates putting letters inside.
'rave' becomes 'rant' (synonyms).
'after' is a charade indicator (letters next to each other).
'party' becomes 'do' (do is a kind of party).
'm' inserted inside 'rant' is 'rmant'.
'rmant' after 'do' is 'DORMANT'.
(Other definitions for dormant that I've seen before include "Temporarily inactive, being mordant" , "Comatose" , "In deep sleep" , "Hibernating" , "Mordant about lying inactive" .)