Dined on starter of radish, receiving pound in change (5)
I believe the answer is:
alter
'change' is the definition.
(I know that change can be written as alter)
'dined on starter of radish receiving pound' is the wordplay.
'dined on' becomes 'ate' (I've seen this in another clue).
'starter of' suggests taking the first letters.
'receiving' indicates putting letters inside.
'pound' becomes 'l' (the pound sign is based on an L).
The first letter of 'radish' is 'r'.
'ate'+'r'='ater'
'ater' placed around 'l' is 'ALTER'.
'in' is the link.
(Other definitions for alter that I've seen before include "Revise" , "Change, modify" , "shift" , "reform" , "Become different" .)