Fascinating gent in car wandering around end of town (10)
I believe the answer is:
entrancing
'fascinating' is the definition.
('entrance' can be a synonym of 'fascinate')
'gent in car wandering around end of town' is the subsidiary indication.
'wandering' indicates an anagram.
'around' is an insertion indicator.
'end of' indicates one should take the final letters.
The last letter of 'town' is 'n'.
'gent'+'in'+'car'='gentincar'
'gentincar' with letters rearranged gives 'entrancig'.
'entrancig' placed around 'n' is 'entrancing'.
(Other definitions for entrancing that I've seen before include "Bewitching" , "Delightful" .)