Don’t Look One in the Mouth; Be Grateful
Puzzle 10 of Bath Time Piece of Cake Pack
Question is: Don’t Look One in the Mouth; Be Grateful
and the answer is: GIFTHORSE
Word Meaning:
GIFT HORSE — (idiomatic) An apparent gift, that has substantial associated costs or drawbacks, especially a gift that does not fit perfectly with the recipient's wants or needs.
Definitions from Wiktionary.