Grand old estate left by sugar magnate is sold (4)
I believe the answer is:
goes
'is sold' is the definition.
I can't judge whether this defines the answer.
'grand old estate left by sugar magnate' is the wordplay.
'grand' becomes 'g' (G is short for grand as in a thousand).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'left by' is a deletion indicator (word is left or abandoned by specified letters ).
'sugar magnate' becomes 'Tate' (as in Tate and Lyle, British sugar company).
'estate' with 'tate' taken out is 'es'.
'g'+'o'+'es'='GOES'
Can you help me to learn more?
(Other definitions for goes that I've seen before include "Functions" , "Travels; attempts" , "Moves" , "Departs; operates" , "Disappears; runs" .)