Adjusted to the East, leaderless, old-fashioned (10)
I believe the answer is:
orientated
'adjusted' is the definition.
(similar in meaning)
'the east leaderless old-fashioned' is the wordplay.
'the east' becomes 'orient' ('orient' can be a synonym of 'east').
'leaderless' means to remove the first letter.
'old fashioned' becomes 'dated' (I've seen this before).
'dated' with its initial letter taken off is 'ated'.
'orient'+'ated'='ORIENTATED'
'to' acts as a link.
(Other definitions for orientated that I've seen before include "Determined" , "adjusted appropriately" .)