Answer: beachcomb

AnswerCrossword Clue
BEACHCOMBScavenge, in a way
BEACHCOMBUse a metal detector, maybe
BEACHCOMBLook for driftwood
BEACHCOMBAdd to a shell collection, say
BEACHCOMBSearch for shells
beachcombto wander along a beach looking for useful objects