Variety of pea that's a good climber (3)
I believe the answer is:
ape
'a good climber' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'variety of pea' is the wordplay.
'variety of' indicates anagramming the letters.
'pea' with letters rearranged gives 'APE'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for ape that I've seen before include "Large primate" , "Simian - copy" , "drill" , "Imitate like primate" , "Primate resembling a human" .)