Answer: goalong

AnswerCrossword Clue
GOALONGAgree (with)
GOALONGCooperate
GOALONGConcur
GOALONGAgree (with).
GOALONGAgree.
GOALONG... with (agree).
GOALONGCooperate (with)
GOALONGSay "Sure, why not?"