Wake partner before call (6)
I believe the answer is:
excite
'wake' is the definition.
(thesaurus)
'partner before call' is the wordplay.
'partner before' becomes 'ex' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'call' becomes 'cite' (citing is a kind of calling).
'ex'+'cite'='EXCITE'
Can you help me to learn more?
(Other definitions for excite that I've seen before include "Thrill" , "Make (someone) eager" , "Arouse, make eager" , "Send" , "Cause strong feelings in" .)