A male perhaps heard schedule (6)
I believe the answer is:
agenda
'schedule' is the definition.
(synonyms)
'a male perhaps heard' is the wordplay.
'male perhaps' becomes 'gender'.
'heard' shows a homophone (sound like).
'gender' sounds like 'genda'.
'a'+'genda'='AGENDA'
(Other definitions for agenda that I've seen before include "Schedule, order of business" , "To-do list" , "List of items of business for committee" , "Individual objective(s)" , "Something perhaps hidden" .)