Answer: hatsoff

AnswerCrossword Clue
HATSOFFPhrase of praise
HATSOFF"Kudos"
HATSOFFCongratulatory phrase
HATSOFFWords of salute
HATSOFFFlag tribute.
HATSOFFThree cheers!
HATSOFFBennett's order to flag viewers
HATSOFFLed Zep "... to (Roy) Harper"
HATSOFF"Congratulations!"