Goal net being moved: that leaves a sour taste (7)
I believe the answer is:
tangelo
'goal net being moved that leaves a sour taste' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'goal net being moved' is the wordplay.
'being moved' is an anagram indicator.
'goal'+'net'='goalnet'
'goalnet' anagrammed gives 'TANGELO'.
Can you help me to learn more?
(Other definitions for tangelo that I've seen before include "fruitful merger?" , "Citrus hybrid - goal net (anag)" , "sharp cross" , "one cross, sour" , "Citrus fruit hybrid" .)