Notice from this source inspiring Queen’s devotion (9)
I believe the answer is:
adherence
'devotion' is the definition.
(I've seen this before)
'notice from this source inspiring queen's' is the wordplay.
'notice' becomes 'ad'.
'from this source' becomes 'hence'.
'inspiring' means one lot of letters goes inside another.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'hence' enclosing 'er' is 'herence'.
'ad'+'herence'='ADHERENCE'
(Other definitions for adherence that I've seen before include "devotion" , "loyalty" , "Sticking together" .)