Way to use bad language, suppressing love (6)
I believe the answer is:
course
'way' is the definition.
(course is a kind of way)
'use bad language suppressing love' is the wordplay.
'use bad language' becomes 'curse' (I've seen this before).
'suppressing' indicates putting letters inside.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'curse' enclosing 'o' is 'COURSE'.
'to' is the link.
(Other definitions for course that I've seen before include "passage" , "Route of the race" , "way" , "soup?" , "Route; lectures" .)