Each mum coming through carries beach things (9)
I believe the answer is:
seashells
'beach things' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.
'each mum coming through carries' is the wordplay.
'each' becomes 'ea' (abbreviation).
'mum' becomes 'sh' (both can mean to be quiet).
'coming through' becomes 'sells' (I can't explain this - if you can you should believe this answer much more).
'carries' is an insertion indicator.
'ea'+'sh'='eash'
'eash' inserted inside 'sells' is 'SEASHELLS'.
Can you help me to learn more?
(Other definitions for seashells that I've seen before include "Coverings of marine organisms" , "''She sells ... on the seashore'' (tongue-twister)" , "Hard outer coverings of salt water molluscs" , "She might sell them on the seashore" , "Protective homes for salt water molluscs" .)