Type of band that is covering Queen in restaurant (9)
I believe the answer is:
brasserie
'in restaurant' is the definition.
(I've seen this before)
'type of band that is covering queen' is the wordplay.
'type of band' becomes 'brass' (**).
'that is' becomes 'ie' ('i.e.' can be a synonym of 'that is').
'covering' means one lot of letters goes inside another.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'brass'+'ie'='brassie'
'brassie' placed around 'er' is 'BRASSERIE'.
(Other definitions for brasserie that I've seen before include "Where to eat" , "Simple restaurant" , "eatery" , "Caf" , "eating place" .)