Venture to accommodate the sick in military quarters (6)
I believe the answer is:
billet
'military quarters' is the definition.
'billet' can be an answer for 'quarters' (I've seen this in another clue). I'm unsure of the 'military' bit.
'venture to accommodate the sick' is the wordplay.
'venture' becomes 'bet' (bet is a kind of venture).
'to accommodate' means one lot of letters goes inside another.
'the sick' becomes 'ill' (I've seen this before).
'bet' going around 'ill' is 'BILLET'.
'in' is the link.
Can you help me to learn more?
(Other definitions for billet that I've seen before include "Job" , "Soldier's lodging" , "Lodging for military personnel" , "accommodation for the men" , "private housing" .)