Those in charge of a bureau at the Royal Society? (8)
I believe the answer is:
officers
'those in charge' is the definition.
The definition suggests an adverb but the answer is not.
'bureau at the royal society?' is the wordplay.
'bureau' becomes 'office' (synonyms).
'at' says to put letters next to each other.
'the royal society?' becomes 'RS'.
'office'+'rs'='OFFICERS'
'of a' acts as a link.
Can you help me to learn more?
(Other definitions for officers that I've seen before include "They hold positions of authority or command" , "Policemen" , "Commissioned members of the military" , "Commissioned ranks in the services" , "Persons with authority" .)