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' indicates the answer is hidden within the clue.
'OTHER' is hidden within 'ascot here'.
(Other definitions for other that I've seen before include "Different, disparate" , "else!" , "Different; additional" , "One may be significant" , "Very unusual" .)