Sex and dope problem is brought to light (7)
I believe the answer is:
exposed
'brought to light' is the definition.
(I've seen this before)
'sex and dope problem' is the wordplay.
'and' means one lot of letters go next to another.
'problem' indicates an anagram.
'sex' after 'dope' is 'dopesex'.
'dopesex' anagrammed gives 'EXPOSED'.
'is' is the link.
(Other definitions for exposed that I've seen before include "Made public" , "Shown up" , "Brought to light" , "Unprotected from the weather" , "at mercy of weather" .)