Well suited to the job, athletic pro scrambled up ropes (3,3,7)
I believe the answer is:
fit for purpose
'well suited to the job' is the definition.
(fit for purpose means suited to a particular job)
'athletic pro scrambled up ropes' is the wordplay.
'athletic' becomes 'fit' (I've seen this in another clue).
'pro' becomes 'for' (I've seen this in another clue).
'scrambled' is an anagram indicator.
'up'+'ropes'='upropes'
'upropes' anagrammed gives 'purpose'.
'fit'+'for'+'purpose'='FIT FOR PURPOSE'
(Other definitions for fit for purpose that I've seen before include "what's appropriate" , "Suitable" .)