Very tasty, her miso in the soup (7)
I believe the answer is:
'very tasty' is the definition.
I can't tell whether this defines the answer.
'her miso in the soup' is the wordplay.
'in the soup' indicates an anagram (soup can mean a mixture).
'hermiso' is an anagram of 'MOREISH'.
Can you help me to learn more?
(Another definition for moreish that I've seen is " addictive".)