Crossword puzzle clue "workers with samples"

REP, to act as a commercial representative

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

BORING, an inner cavity