A coach has a way of cursing! (5)
I believe the answer is:
abuse
'cursing' is the definition.
(thesaurus)
'a coach has a way' is the wordplay.
'coach' becomes 'bus' (synonyms).
'has' says to put letters next to each other.
'a way' becomes 'e' (Compass direction - East).
'a'+'bus'+'e'='ABUSE'
'of' acts as a link.
(Other definitions for abuse that I've seen before include "Treat badly - hurl insults" , "Bully" , "Deceit" , "Insulting language" , "Vilify" .)