Shrink from agreement (8)
I believe the answer is:
contract
This clue is a double definition.
'shrink' is the first definition.
(contracting is a kind of shrinking)
'agreement' is the second definition.
(contract is a kind of agreement)
'from' is the link.
(Other definitions for contract that I've seen before include "Become smaller" , "Shrink from the business agreement" , "Come down with" , "Covenant" , "Shrink in legal agreement?" .)