Backward child going round bend lives in drug-induced state (8)
I believe the answer is:
narcosis
'drug-induced state' is the definition.
(I've seen this before)
'backward child going round bend lives' is the wordplay.
'backward child' becomes 'nos' (I can't explain this - if you can you should believe this answer much more).
'going round' means one lot of letters goes inside another (some letters go around others).
'bend' becomes 'arc' (arcing is a kind of bending).
'lives' becomes 'is' ('be' can be a synonym of 'live').
'nos' placed around 'arc' is 'narcos'.
'narcos'+'is'='NARCOSIS'
'in' is the link.
Can you help me to learn more?
(Other definitions for narcosis that I've seen before include "Drowsiness produced by a drug" , "State of stupor" , "State of sleep produced by drugs" , "Drug effect" , "suffering from drugs" .)