Food business needs elastic supply (12)
I believe the answer is:
delicatessen
'food' is the definition.
(delicatessen is a kind of food)
'needs elastic supply' is the wordplay.
'supply' indicates an anagram (in a supple way).
'needs'+'elastic'='needselastic'
'needselastic' with letters rearranged gives 'DELICATESSEN'.
'business' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for delicatessen that I've seen before include "food store?" , "Shop selling specialist foods" , "Here one gets exotic foods" , "Fine foods shop" , "Rare food shop" .)