Clue: Good friend of Mole enthrals you with one tip (8)
Answer: GRATUITY
Explanation: Good friend of Mole enthrals you with one tip (8)
**G** (good) + **RATTY** ("friend of Mole", in *Wind in the Willows*) *enthrals* **U** (you, in textspeak) with **I** ("one")