At the end of the day, people lose the head about this golden, delicious one. (4)
I believe the answer is:
yolk
'this golden delicious one' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'at the end of the day people lose the head' is the wordplay.
'at the end of' suggests the final letters.
'people' becomes 'folk' (informal term for people).
'lose the head' means to remove the first letter (I've seen 'losing the head' mean this).
The last letter of 'day' is 'y'.
'folk' with its initial letter removed is 'olk'.
'y'+'olk'='YOLK'
'about' is the link.
Can you help me to learn more?
(Other definitions for yolk that I've seen before include "Food kept by white" , "Part of a 7 Down" , "Yellow part of an egg" , "Bird food" , "Soldiers go in here" .)