Wild lout gets three points, becoming solvent (7)
I believe the answer is:
toluene
'solvent' is the definition.
(toluene is a kind of solvent)
'wild lout gets three points' is the wordplay.
'wild' indicates anagramming the letters.
'gets' says to put letters next to each other.
'three points' becomes 'ene' (I've seen this in other clues).
'lout' is an anagram of 'tolu'.
'tolu'+'ene'='TOLUENE'
'becoming' acts as a link.
(Other definitions for toluene that I've seen before include "Hydrocarbon resembling benzene" , "Benzene-like liquid" , "flammable liquid" , "Compound" , "Hydrocarbon present in petroleum" .)