Royal attendants bemoan banking eastern money (7)
I believe the answer is:
retinue
'royal attendants' is the definition.
'retinue' can be an answer for 'attendants' (I've seen this before). I am unsure of the 'royal' bit.
'bemoan banking eastern money' is the wordplay.
'bemoan' becomes 'rue' (I've seen this before).
'banking' is an insertion indicator.
'eastern' becomes 'e'.
'money' becomes 'tin' (I've seen this before).
'e'+'tin'='etin'
'rue' going around 'etin' is 'RETINUE'.
Can you help me to learn more?
(Other definitions for retinue that I've seen before include "Group of followers" , "Suite of followers" , "company" , "VIP's attendants" , "Cortege" .)