One who encourages self-destructive behaviour is at centre of teenage troublespot, right? (7)
I believe the answer is:
enabler
'one who encourages self-destructive behaviour is' is the definition.
The definition suggests a singular noun which matches the answer.
'centre of teenage troublespot right?' is the wordplay.
'centre of' indicates the central letters.
'troublespot' becomes 'ble' (I can't explain this - if you can you should give a lot more credence to this answer).
'right?' becomes 'R' (common abbreviation).
The centre of 'teenage' is 'ena'.
'ena'+'ble'+'r'='ENABLER'
'at' is the link.
Can you help me to learn more?
(Other definitions for enabler that I've seen before include "Someone who makes something possible for another" , "One giving authority" , "It makes (thing) possible" , "Something that makes (action) possible" , "I give authority" .)