Time to get friend to agree (5)
I believe the answer is:
tally
'agree' is the definition.
('tally' can be a synonym of 'agree')
'time to get friend' is the wordplay.
'time' becomes 't'.
'to get' means one lot of letters go next to another.
'friend' becomes 'ally' (I've seen this before).
't'+'ally'='TALLY'
'to' acts as a link.
(Other definitions for tally that I've seen before include "Count up; match" , "Record; current score" , "Reckoning of a debt or of votes" , "highly?" , "Current score; agree" .)