Behold a new advance (4)
I believe the answer is:
loan
'advance' is the definition.
(thesaurus)
'behold a new' is the wordplay.
'behold' becomes 'lo'.
'a new' becomes 'an' (I've seen this in other clues).
'lo'+'an'='LOAN'
(Other definitions for loan that I've seen before include "It's given but has to be returned" , "Cash advance" , "Money borrowed; lend" , "Advance, borrowing" , "Money borrowed at interest" .)