Uncle Andrew keeping off the drugs (5)
I believe the answer is:
clean
'off the drugs' is the definition.
I can't tell whether this definition defines the answer.
'uncle andrew keeping' is the wordplay.
'keeping' indicates a hidden word.
'CLEAN' can be found hidden inside 'uncle andrew'.
Can you help me to learn more?
(Other definitions for clean that I've seen before include "Squeaky?" , "Completely (colloq.), free of dirt" , "Quite" , "Untainted" , "Uncontaminated" .)