Baseball great DiMaggio (3)
I believe the answer is:
joe
'baseball great dimaggio' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for joe that I've seen before include "Short for Joseph" , "One of spelt out words" , "--- Gargery (Great Expectations)" , "-- Bloggs, ordinary man" , "-- Orton, playwright" .)