Hack majority of trip with top celebs (10)
I believe the answer is:
journalist
'hack' is the definition.
(thesaurus)
'majority of trip with top celebs' is the wordplay.
I cannot quite understand how this works, but
'of' could be 'o' and 'o' is found in the answer.
'celebs' could be 'alist' (I have seen 'Top celebs' mean 'a list' so perhaps 'celebs' could also mean 'a list') and 'alist' is found in the answer.
This explanation may well be incorrect...
(Other definitions for journalist that I've seen before include "Correspondent" , "Hack" , "Newspaper 16 dn" , "Writer" , "Newspaperman" .)