Old love had disposition to get out (8)
I believe the answer is:
extended
'to get out' is the definition.
(I've seen this before)
'old love' is the wordplay.
'old' becomes 'ex' (prefix meaning former or onetime).
'love' becomes 'tended' (I can't explain this - if you can you should give a lot more credence to this answer).
'ex'+'tended'='EXTENDED'
'had disposition' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for extended that I've seen before include "Reached out for next deed" , "Widened" , "Stretched or reached out - the hand of friendship? (8)" , "Stretched out over time or space" , "Stretched, drew out" .)