A frog prepared to succeed (2,3)
I believe the answer is:
go far
'succeed' is the definition.
(going far is a kind of succeeding)
'a frog prepared' is the wordplay.
'prepared' is an anagram indicator.
'a'+'frog'='afrog'
'afrog' anagrammed gives 'GO FAR'.
'to' acts as a link.
(Other definitions for go far that I've seen before include "Last" , "Achieve great things" , "Make real progress, achieve much" , "flourish?" , "Succeed" .)