Enough to support former partner, for instance (7)
I believe the answer is:
example
'instance' is the definition.
('example' can be a synonym of 'instance')
'enough to support former partner' is the wordplay.
'enough' becomes 'ample' (I've seen this before).
'to support' says to put letters next to each other (in a down clue, some letters hold others up).
'former partner' becomes 'ex'.
'ample' put after 'ex' is 'EXAMPLE'.
'for' acts as a link.
(Other definitions for example that I've seen before include "Representative object" , "Punishment" , "not the actual version" , "Ideal - specimen" , "Precedent" .)