It's about what's not right with sticky stuff in various plants and trees (5)
I believe the answer is:
resin
'various plants and trees' is the definition.
I can't tell whether this defines the answer.
'it's about what's not right with sticky stuff in' is the wordplay.
I cannot really understand how this works, but
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is found in the answer.
'right' could be 'r' (common abbreviation) and 'r' is present in the answer.
'in' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for resin that I've seen before include "Sticky stuff from pine trees" , "Substance produced from sap of some plants and trees" , "Cannabis, say" , "hashish, say" , "Tree gum" .)