Staff answer about fan turning up in the Albert Hall, say (7)
I believe the answer is:
rotunda
'the albert hall say' is the definition.
(the Royal Albert Hall is a rotunda)
'staff answer about fan turning up' is the wordplay.
'staff' becomes 'rod' (both can mean a pole or stick).
'answer' becomes 'a' (abbreviation eg in Q and A).
'about' is an insertion indicator.
'fan' becomes 'nut' (both can mean an enthusiast).
'turning up' says the letters should be written in reverse.
'nut' reversed gives 'tun'.
'rod'+'a'='roda'
'roda' placed around 'tun' is 'ROTUNDA'.
'in' acts as a link.
(Other definitions for rotunda that I've seen before include "Italian Pantheon, for instance" , "Round domed building" , "circular construction" , "Circular building with a dome" , "Circular room or building" .)