After leaving Turkey, incisive head of state charms (8)
I believe the answer is:
enchants
'state charms' is the definition.
'enchants' can be an answer for 'charms' (I've seen this before). I am not certain of the 'state' bit.
'after leaving turkey incisive head of' is the wordplay.
'after leaving' suggests deleting specific letters.
'turkey' becomes 'tr' (abbreviation eg in internet addresses).
'incisive' becomes 'trenchant' (I've seen this before).
'head of' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'trenchant' with 'tr' removed is 'enchant'.
'enchant'+'s'='ENCHANTS'
Can you help me to learn more?
(Other definitions for enchants that I've seen before include "Bewitches and charms" , "rivets ..." , "Possesses" , "Delights and casts under a spell" .)