At end of dinner for one, throw out another sprout (8)
I believe the answer is:
regrowth
'another sprout' is the definition.
(another growth or spout)
'at end of dinner for one throw out' is the wordplay.
'at end of' says to take the final letters.
'for one' becomes 'eg' (both can mean 'for example').
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
The last letter of 'dinner' is 'r'.
'throw' with letters rearranged gives 'rowth'.
'r'+'eg'+'rowth'='REGROWTH'
(Other definitions for regrowth that I've seen before include "Renewed expansion" , "Fresh expansion" .)