Answer: thanker

AnswerCrossword Clue
THANKERPolite guest
thankerhold responsible had only himself to thank for his loss
thankerone who thanks (to express gratitude)
thankerto express gratitude to thanked her for the present used in the phrase thank you usually without a subject to politely express gratitude thank you for your consideration or sometimes to emphasize a preceding statement especially by implying that it is not subject to question likes her job just fine, thank you used in such phrases as thank God, thank goodness usually without a subject to express gratitude or more often only the speaker's or writer's pleasure or satisfaction in something