Fall for rogue in suit (7)
I believe the answer is:
cascade
'fall' is the definition.
(cascading is a kind of falling)
'rogue in suit' is the wordplay.
'rogue' becomes 'cad' (I've seen this before).
'in' is an insertion indicator.
'suit' becomes 'case' ('case' can be a synonym of 'suit').
'cad' inserted within 'case' is 'CASCADE'.
'for' is the link.
(Other definitions for cascade that I've seen before include "Small waterfall or series of them" , "Shower" , "Torrent" , "Dramatic fall" , "Tumble down (like water)" .)