Unreliable quote about a bishop returning (7)
I believe the answer is:
erratic
'unreliable' is the definition.
('erratic' can be similar in meaning to 'unreliable')
'quote about a bishop returning' is the wordplay.
'quote' becomes 'cite' ('cite' can be a synonym of 'quote').
'about' indicates putting letters inside.
'a bishop' becomes 'arr' (I can't explain this - if you can you should believe this answer much more).
'returning' shows that the letters should be reversed in order.
'cite' going around 'arr' is 'citarre'.
'citarre' back-to-front is 'ERRATIC'.
Can you help me to learn more?
(Other definitions for erratic that I've seen before include "Unstable" , "Liable to sudden unpredictable change" , "Shifting, unpredictable" , "Changeable" , "Shifting like Cartier" .)