Upset part of effendi's turban (7)
I believe the answer is:
disturb
'upset' is the definition.
(I know that upset can be written as disturb)
'part of effendi's turban' is the wordplay.
'part of' indicates a hidden word.
'DISTURB' is hidden within 'effendis turban'.
(Other definitions for disturb that I've seen before include "Break" , "Molest" , "Upset or tamper with" , "Upset - agitate" , "inconvenience" .)