Crooked head of state in accident and emergency normally leads (9)
I believe the answer is:
misshapen
'crooked' is the definition.
(thesaurus)
'head of state in accident and emergency normally leads' is the wordplay.
'head of' says to take the initial letters.
'in' indicates putting letters inside.
'accident' becomes 'mishap' (mishap is a kind of accident).
'and' says to put letters next to each other.
'leads' says to take the initial letters.
The initial letter of 'state' is 's'.
The first letters of 'emergency normally' is 'en'.
's' inserted within 'mishap' is 'misshap'.
'misshap'+'en'='MISSHAPEN'
(Other definitions for misshapen that I've seen before include "Unnaturally formed" , "Deformed" , "Badly formed" , "Ugly in form" , "Badly designed" .)