Proceed to call back at a quarter after (7)
I believe the answer is:
emanate
'proceed' is the definition.
(thesaurus)
'call back at a quarter after' is the wordplay.
'call' becomes 'name' ('name' can be a synonym of 'call'**).
'back' says the letters should be written in reverse.
'a quarter' becomes 'e'.
'after' means one lot of letters go next to another.
'name' back-to-front is 'eman'.
'eman'+'at'+'e'='EMANATE'
'to' is the link.
(Other definitions for emanate that I've seen before include "spring" , "Send out" , "Rise" , "Come out (of source)" , "Manatee (anag.)" .)