Whole of Queen brought back into being (8)
I believe the answer is:
entirety
'whole' is the definition.
(thesaurus)
'queen brought back into being' is the wordplay.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'brought back' is a reversal indicator.
'into' means one lot of letters goes inside another.
'being' becomes 'entity' (I've seen this in other clues).
'er' back-to-front is 're'.
're' inserted into 'entity' is 'ENTIRETY'.
'of' is the link.
(Other definitions for entirety that I've seen before include "The lot" , "Universe" , "Absoluteness" , "Totality" , "Completeness" .)