Allow to pass to leg, perhaps (3,2)
I believe the answer is:
let go
'allow' is the definition.
The answer and definition can be both to do with fundamental existence as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?
'to pass to leg perhaps' is the wordplay.
'to pass' says to put letters next to each other.
'perhaps' is an anagram indicator.
'to' after 'leg' is 'legto'.
'legto' anagrammed gives 'LET GO'.
Can you help me to learn more?
(Other definitions for let go that I've seen before include "Relax grip and release" , "Stop holding" , "Give up" , "Discuss no further - dismiss - release" , "Release or permit to depart" .)