Attendants of European Republican deluged by questions ... (9)
I believe the answer is:
equerries
'attendants' is the definition.
(equerry is a kind of attendant)
'european republican deluged by questions' is the wordplay.
I cannot quite understand how this works, but
'european' could be 'e' (abbreviation e.g. EU) and 'e' is found in the answer.
'republican' could be 'r' (political abbreviation) and 'r' is found within the answer.
'questions' could be 'queries' ('query' can be a synonym of 'question') and 'queries' is located in the remaining letters.
No letters remain.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for equerries that I've seen before include "Members of royal household" , "Royal attendants" .)