Lusty woodland deity took a pew by youngster, gutted (5)
I believe the answer is:
satyr
'lusty woodland deity' is the definition.
(I've seen this in another clue)
'took a pew by youngster gutted' is the wordplay.
'took a pew by' becomes 'sat' (I can't justify this - if you can you should give a lot more credence to this answer).
'gutted' means to remove the middle letters (to gut something is to remove its insides).
'youngster' with its centre removed is 'yr'.
'sat'+'yr'='SATYR'
Can you help me to learn more?
(Other definitions for satyr that I've seen before include "Woodland god; butterfly" , "Woodland deity, attendant on Bacchus" , "Lecherous god" , "Lecherous woodland goat-man deity" , "nymphalid" .)