Live in front of a filthy place round lake? That's vile (7)
I believe the answer is:
beastly
'vile' is the definition.
('beastly' can be a synonym of 'vile')
'live in front of a filthy place round lake?' is the wordplay.
'live' becomes 'be' ('be' can be a synonym of 'live'**).
'in front of' is a charade indicator (letters next to each other).
'filthy place' becomes 'sty' (I've seen this before).
'round' is an insertion indicator.
'lake?' becomes 'l'.
'sty' enclosing 'l' is 'stly'.
'be'+'a'+'stly'='BEASTLY'
'that's' acts as a link.
(Other definitions for beastly that I've seen before include "Brutal - foul" , "Very unpleasant" , "Horrid" , "Brutish" , "Bestial" .)