Call into shop — husband out for seafood (7)
I believe the answer is:
scallop
'for seafood' is the definition.
(scallop is a kind of seafood)
'call into shop husband out' is the wordplay.
'into' indicates putting letters inside.
'husband' becomes 'h'.
'out' suggests deleting specific letters.
'shop' with 'h' removed is 'sop'.
'call' put inside 'sop' is 'SCALLOP'.
(Other definitions for scallop that I've seen before include "Marine bivalve" , "Bivalve mollusc with fan-shaped shell" , "Shellfish - badge worn by pilgrims to Santiago de Compostela" , "Edible bivalve mollusc" , "Shell - sign of a pilgrim" .)