For Sailor Dye, the queen is one taking no part (9)
I believe the answer is:
abstainer
'one taking no part' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'for isailor dyei the queen' is the wordplay.
I cannot really see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
'queen' could be 'er' (abbreviation for Elizabeth Regina) and 'er' is found within the answer.
This may be the basis of clue (or it may be nonsense).
'is' is the link.
Can you help me to learn more?
(Other definitions for abstainer that I've seen before include "Rechabite" , "Teetotaller" , "AA member" , "Band of Hope member" , "Bull's not my stuff" .)