Commercial shot around Britain is acceptable (10)
I believe the answer is:
admissible
'acceptable' is the definition.
(thesaurus)
'commercial shot around britain' is the wordplay.
'commercial' becomes 'ad' (abbreviation for advertisement).
'shot' becomes 'missile' ().
'around' is an insertion indicator.
'britain' becomes 'b' (common abbreviation as in GB).
'missile' going around 'b' is 'missible'.
'ad'+'missible'='ADMISSIBLE'
'is' acts as a link.
(Other definitions for admissible that I've seen before include "Acceptable, valid" , "(As evidence in court) valid" .)