Crossword puzzle clue "mining samples"

CORE, to remove the central part of

ORE, rock containing a valuable metal, also OWRE

AB, an abdominal muscle

ALE, a kind of beer, made without using hops as a flavouring, also YILL

(Spenser) a clerical garb worn on the shoulders, also AMICE

(Sinhalese) a large S American snake

to put to the proof, to make trial of