Might this be secured without partner given mention? (4)
I believe the answer is:
loan
'might this be secured' is the definition.
(a loan can be secured)
'without partner given mention?' is the wordplay.
'without partner' becomes 'lone'.
'given mention?' indicates a 'sounds like' (homophone) clue.
'lone' sounds like 'LOAN'.
(Other definitions for loan that I've seen before include "Advance (money)" , "Credit" , "Money borrowed; lend" , "Money borrowed at interest" , "Advance, borrowing" .)