Small invoice for soldier's lodging? (6)
I believe the answer is:
billet
'soldier's lodging?' is the definition.
(I've seen this before)
'small invoice' is the wordplay.
I cannot really see how this works, but
'invoice' could be 'bill' (synonyms) and 'bill' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for billet that I've seen before include "letter in Paris" , "Place for a soldier to stay" , "Military lodging - little note" , "Assign to lodging" , "Soldier's lodging" .)