Answer: croze

AnswerCrossword Clue
CROZEBarrel groove.
CROZEGroove in a barrel stave
CROZECooper's tool
crozetool used by a cooper for cutting such a groove
crozethe groove at either end of the staves of a barrel, cask, etc., into which the edge of the head fits
crozea tool used in barrel-making, also CROZER