Temporarily secures an obligation we hear (5)
I believe the answer is:
tacks
'temporarily secures' is the definition.
'tacks' can be an answer for 'secures' (tacking is a kind of securing). I am not certain of the 'temporarily' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for tacks that I've seen before include "Shorts nails with big heads" , "Changes course" , "Approaches" , "Small broad-headed nails" , "a few points" .)