Joint a male found by marijuana container (6)
I believe the answer is:
jampot
'container' is the definition.
(jampot is a kind of container)
'joint a male found by marijuana' is the wordplay.
'joint' becomes 'ja' (I can't explain this - if you can you should believe this answer much more).
'a male' becomes 'm' (common abbreviation).
'found by' is a charade indicator (letters next to each other).
'marijuana' becomes 'pot' (slang term for marijuana).
'ja'+'m'+'pot'='JAMPOT'
(Other definitions for jampot that I've seen before include "Preserve container" , "collar" .)