Cleared one ensnared by drug for adults (10)
I believe the answer is:
exonerated
'cleared' is the definition.
(I know that cleared can be written as exonerated)
'one ensnared by drug for adults' is the wordplay.
'ensnared by' means one lot of letters goes inside another (I've seen this in other clues).
'drug' becomes 'e' (E is another name for ecstasy).
'for adults' becomes 'X-rated' (as in adult material).
'e'+'xrated'='exrated'
'one' going within 'exrated' is 'EXONERATED'.
(Other definitions for exonerated that I've seen before include "justified?" , "Acquitted" .)