Many things to bid for (4)
I believe the answer is:
lots
I believe this clue is a double definition.
'many' is the first definition.
(lots of something)
'things to bid for' is the second definition.
(items in an auction)
(Other definitions for lots that I've seen before include "Many found in slot" , "may be drawn" , "Something to draw" , "Large numbers at auction" , "Large number or amount" .)