Is Warne prepared to administer an oath? (5,2)
I believe the answer is:
swear in
'administer an oath?' is the definition.
(I've seen this in another clue)
'is warne prepared' is the wordplay.
'prepared' is an anagram indicator.
'is'+'warne'='iswarne'
'iswarne' is an anagram of 'SWEAR IN'.
'to' is the link.
(Other definitions for swear in that I've seen before include "Inaugurate by oath" , "prepare to deliver evidence" , "Administer official oath" , "Get into office" , "Administer oath to one taking up office" .)