Upset daughter regrettably shows cold side (5)
I believe the answer is:
salad
'cold side' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'upset daughter regrettably' is the wordplay.
'upset' says the letters should be written backwards.
'daughter' becomes 'd' (genealogical abbreviation).
'regrettably' becomes 'alas' ('alas' is said before regrettable news).
'd'+'alas'='dalas'
'dalas' backwards is 'SALAD'.
'shows' acts as a link.
Can you help me to learn more?
(Other definitions for salad that I've seen before include "See 22" , "- Days (musical)" , "Food dish" , "Cold dish of vegetables or fruits" , "Healthy dish" .)