Tent, mine, let out? Right (11)
I believe the answer is:
entitlement
'right' is the definition.
(entitlement is a kind of right)
'tent mine let out?' is the wordplay.
'out?' is an anagram indicator (I've seen 'out of' mean this).
'tent'+'mine'+'let'='tentminelet'
'tentminelet' anagrammed gives 'ENTITLEMENT'.
(Other definitions for entitlement that I've seen before include "One's due" , "Right (to receive something)" , "amount" .)