Follow the introduction of Ottoman governor (4)
I believe the answer is:
obey
'follow' is the definition.
(I've seen this before)
'the introduction of ottoman governor' is the wordplay.
'the introduction' indicates taking the first letters.
'ottoman governor' becomes 'bey' (I've seen this before).
The first letter of 'of' is 'o'.
'o'+'bey'='OBEY'
(Other definitions for obey that I've seen before include "Do as you're told!" , "Accept instructions" , "Follow orders" , "Take orders" , "Toe the line" .)