A hundred make a bid for the treasure-chest (6)
I believe the answer is:
coffer
'chest' is the definition.
(I know that chest can be written as coffer)
'a hundred make a bid' is the wordplay.
'a hundred' becomes 'C' (Roman numerals).
'make a bid' becomes 'offer' (I've seen this in another clue).
'c'+'offer'='COFFER'
'for the treasure' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for coffer that I've seen before include "Treasury - chest for valuables" , "Strongbox" , "Treasure chest" , "Strong box at the treasury" , "Money chest sounds like one with lung trouble" .)