Before noble, one queen (7)
I believe the answer is:
earlier
'before' is the definition.
(synonyms)
'noble one queen' is the wordplay.
'noble' becomes 'earl' (earl is a kind of noble).
'one' becomes 'i' (Roman numeral).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'earl'+'i'+'er'='EARLIER'
(Other definitions for earlier that I've seen before include "(Happening) before in time" , "Older" , "Sooner in time" , "Nearer the beginning" , "Beforehand" .)