Time for me to change into top perhaps (5)
I believe the answer is:
tempo
'time' is the definition.
(tempo is a kind of time)
'me to change into top perhaps' is the wordplay.
'to change' indicates an anagram.
'into' indicates putting letters inside.
'perhaps' is an anagram indicator.
'me' is an anagram of 'em'.
'top' anagrammed gives 'tpo'.
'em' placed within 'tpo' is 'TEMPO'.
'for' is the link.
(Other definitions for tempo that I've seen before include "Pace, rate" , "Rhythm, metre" , "Musical beat or rhythm" , "Pace of a musical piece" , "Speed at which a musical composition is to be played" .)