Insect found in place close to rainforest (6)
I believe the answer is:
locust
'insect' is the definition.
(locust is a kind of insect)
'place close to rainforest' is the wordplay.
'place' becomes 'locus' (I've seen this before).
'close to' suggests the final letters (the close/ending of).
The final letter of 'rainforest' is 't'.
'locus'+'t'='LOCUST'
'found in' is the link.
(Other definitions for locust that I've seen before include "Large insect" , "A deadly grasshopper seen in plagues" , "Voracious insect, travels in swarms" , "Predatory grasshopper that swarms" , "Migratory crop stripper" .)