It's right for page to lead Queen (6)
I believe the answer is:
proper
'it's right' is the definition.
('proper' can be similar in meaning to 'right')
'for page to lead queen' is the wordplay.
'for' becomes 'pro' (I've seen this before).
'to lead' suggests taking the first letters.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
The first letter of 'page' is 'p'.
'pro'+'p'+'er'='PROPER'
(Other definitions for proper that I've seen before include "Right, correct or appropriate" , "Authentic" , "Suitable or appropriate" , "Appropiate, right" , "Correct in behaviour" .)