Mum getting children fruit (7)
I believe the answer is:
damsons
'fruit' is the definition.
(I've seen this before)
'mum getting children' is the wordplay.
'mum getting' becomes 'dam' (I am not sure about this - if you are sure you should believe this answer much more).
'children' becomes 'sons' (son is a kind of child).
'dam'+'sons'='DAMSONS'
Can you help me to learn more?
(Other definitions for damsons that I've seen before include "Plum-like purple types of fruit" , "Plum-like purple fruits" .)