Portion of money from large farm in borders of Tennessee (7)
I believe the answer is:
tranche
'portion of money' is the definition.
(I've seen this before)
'large farm in borders of tennessee' is the wordplay.
'large farm' becomes 'ranch' (I've seen this before).
'in' indicates putting letters inside.
'borders of' suggests removing the centre.
'tennessee' with its centre removed is 'te'.
'ranch' placed into 'te' is 'TRANCHE'.
'from' acts as a link.
(Other definitions for tranche that I've seen before include "Part or block of something" , "A portion of something (especially money)" , "Part of the loan" , "Measure" , "Block of shares, say" .)