### Clue: Covering bottom of utensil, often slippery — is it? (6)
### Answer: TEFLON 
 ### Explanation: Definition: Covering bottom of utensil, often slippery — is it
 **Last letter of**(bottom of, in a down clue) "utensil" **contained in**(Covering …) **anagram of**(… slippery) OFTEN.
Answer: Trademark name for a layer of synthetic resin covering the bottom of, say, pots and pans, so that they are non-stick;slippery.
A WIWD clue.