Trouble in road behind nightclub (7)
I believe the answer is:
discord
'trouble' is the definition.
(thesaurus)
'road behind nightclub' is the wordplay.
'road' becomes 'rd' (abbreviation).
'behind' says to put letters next to each other.
'nightclub' becomes 'disco' (a disco is a club for dancing).
'rd' put after 'disco' is 'DISCORD'.
'in' acts as a link.
(Other definitions for discord that I've seen before include "Lack of agreement" , "Friction" , "Strife, lack of harmony" , "Opposition" , "Dissension" .)