A queen embraced by darling Dicky (10)
I believe the answer is:
precarious
'dicky' is the definition.
(both can mean unreliable or unsteady)
'a queen embraced by darling' is the wordplay.
'queen' becomes 'r' (r is abbreviation regina. e.g. in ER ).
'embraced' is an insertion indicator.
'by darling' becomes 'precious' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'a'+'r'='ar'
'ar' placed within 'precious' is 'PRECARIOUS'.
Can you help me to learn more?
(Other definitions for precarious that I've seen before include "Not having a steady position" , "having difficulty remaining upright" , "Uncertain; likely to fall" , "Hairy" , "Highly insecure" .)