Hole created by tailless arboreal creature (4)
I believe the answer is:
slot
'hole' is the definition.
(thesaurus)
'tailless arboreal creature' is the wordplay.
'tailless' means to remove the last letter (the tail of the word is removed).
'arboreal creature' becomes 'sloth' (I've seen this before).
'sloth' with its final letter taken off is 'SLOT'.
'created by' acts as a link.
(Other definitions for slot that I've seen before include "Narrow opening, for cash say" , "Long narrow opening" , "Small opening, for a coin say" , "Narrow opening as in gaming machine" , "Hole for money" .)