Providing funds for the last bit unpaid (8)
I believe the answer is:
endowing
'providing funds for' is the definition.
(I've seen this in another clue)
'last bit unpaid' is the wordplay.
'last bit' becomes 'end' (I've seen this in another clue).
'unpaid' becomes 'owing' (similar in meaning).
'end'+'owing'='ENDOWING'
'the' is the link.
(Other definitions for endowing that I've seen before include "Making donations" , "Presenting" .)