Wager involving trouble in lodge (6)
I believe the answer is:
billet
'lodge' is the definition.
(billeting is a kind of lodging)
'wager involving trouble' is the wordplay.
'wager' becomes 'bet' ('bet' can be a synonym of 'wager').
'involving' is an insertion indicator.
'trouble' becomes 'ill' ('ill' can be a synonym of 'trouble'**).
'bet' enclosing 'ill' is 'BILLET'.
'in' acts as a link.
(Other definitions for billet that I've seen before include "Post" , "Lodgings for troops or evacuees" , "Place for a soldier to stay" , "Job" , "Soldier's lodging" .)