Rather like meal’s splendour (8)
I believe the answer is:
flourish
'splendour' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'rather like meal's' is the wordplay.
I cannot quite understand how this works, but
'like' could be 'ish' (similar in meaning) and 'ish' is present in the answer.
'meal' could be 'flour' (flour is a kind of meal) and 'flour' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for flourish that I've seen before include "Showy gesture" , "success" , "show off" , "Thrive; ornamental passage of music" , "Grow vigorously and healthily" .)