Answer: CELTS

AnswerCrossword Clue
CELTSManx speakers
CELTSWelshmen et al.
CELTSBean Town team
CELTSGaels and Welsh
CELTSIrish, e.g.
CELTSFleetCenter five
CELTSTD Garden NBA team
CELTSScots and Welsh
CELTSBoston hoopsters, in headlines
CELTSAncient Britons
CELTSNBA team, in headlines
CELTSSome Britons
CELTSManx, for example
CELTSFounders of Milan
CELTSThey called Scotland "Alba"
CELTSBoston's basketball team, familiarly
CELTSDruids, e.g.
CELTSSamhain celebrants
CELTSIrishmen.
CELTSBretons and Britons.
celtsax of stone or metal without perforations or grooves, for hafting
CELTSGaels
CELTSIrish ancestors
CELTSMen in green
CELTSDoc's team
CELTSBoston hoopsters, for short
CELTSBird's team, briefly
CELTSBoston NBAers
CELTSBoston team, briefly
CELTS17-time NBA champs
CELTSOld Irish
CELTSBoston team members
CELTSStonehenge builders
CELTSEuropeans of the 1st millennium B.C.
CELTSCornishmen
CELTSHibernians
CELTSBoston team, informally
CELTSThe Welsh, the Bretons, et al.
CELTSBoston Garden heroes, to their fans
CELTSIrish folk