Admitted to hotel, deter moving on to rest of Bognor (10)
I believe the answer is:
registered
'admitted to hotel' is the definition.
(checked in to a hotel)
'deter moving on to rest of bognor' is the wordplay.
'moving' indicates anagramming the letters.
'on' is an insertion indicator (as in clothing 'on' a person).
'to rest of bognor' becomes 'regis' (the rest of the place name Bognor Regis).
'deter' with letters rearranged gives 'tered'.
'tered' placed around 'regis' is 'REGISTERED'.
(Other definitions for registered that I've seen before include "Officially recorded" , "Sunk in" , "Enrolled" , "Recorded; expressed (an opinion)" , "as post may be" .)