Different part of Ascot here (5)
I believe the answer is:
other
'different' is the definition.
(similar in meaning)
'part of ascot here' is the wordplay.
'part of' says the answer is hidden in the clue.
'OTHER' is hidden in the letters of 'ascot here'.
(Other definitions for other that I've seen before include "Different, disparate" , "else!" , "Different; additional" , "One may be significant" , "Very unusual" .)