Common sense to ring the Queen, very anxious (7)
I believe the answer is:
nervous
'anxious' is the definition.
('nervous' can be a synonym of 'anxious')
'common sense to ring the queen very' is the wordplay.
'common sense' becomes 'nous' (nous is a kind of common sense).
'to ring' means one lot of letters goes inside another.
'the queen' becomes 'er' (Elizabeth Regina).
'very' becomes 'v' (abbreviation).
'er'+'v'='erv'
'nous' placed around 'erv' is 'NERVOUS'.
(Other definitions for nervous that I've seen before include "in a stew" , "Fearful or apprehensive" , "Frightened" , "Agitated - excitable" , "Twitchy" .)