Tasty? No thanks! (3)
I believe the answer is:
sty
'tasty? no thanks' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'tasty? no thanks' is the wordplay.
'no' suggests deleting specific letters.
'thanks' becomes 'ta' (UK informal version of 'thank you').
'tasty' with 'ta' taken out is 'STY'.
Can you help me to learn more?
(Other definitions for sty that I've seen before include "Enclosure for swine" , "See 15" , "Pig home or eye sore" , "Piggery" , "Sore on eyelid" .)