King and queen cook, securing India's top cover (8)
I believe the answer is:
kerchief
'top cover' is the definition.
(garment covering the head)
'king and queen cook securing india's' is the wordplay.
'king and queen' becomes 'ker' (K for King and ER for Elizabeth Regina).
'cook' becomes 'chef' (both can mean someone who cooks).
'securing' means one lot of letters goes inside another.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'chef' placed around 'i' is 'chief'.
'ker'+'chief'='KERCHIEF'
(Other definitions for kerchief that I've seen before include "Square scarf folded in a triangle and worn on head or neck" , "Neckcloth" , "Covering" , "Cloth cover for neck/head" , "Headscarf" .)