Passionate batting perfect, perhaps? (7)
I believe the answer is:
intense
'passionate' is the definition.
(thesaurus)
'batting perfect perhaps?' is the wordplay.
'batting' becomes 'in'.
'perfect perhaps?' becomes 'tense' (grammar**).
'in'+'tense'='INTENSE'
(Other definitions for intense that I've seen before include "Extreme - strong" , "Strongly felt" , "Acute, exteme" , "Extremely emotional" , "say, description of campers?" .)