Expression of gratitude (6)
'expression of gratitude' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for thanks that I've seen before include "Word of appreciation" , "I am grateful" , "Brief expression of appreciation" , "I appreciate that" , "Polite acknowledgment" .)
'expression of gratitude' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for thank you that I've seen before include "I appreciate that" , "I'm grateful" , "Polite reply (to gift)" , "Much obliged!" , "show appreciation" .)