Preserve weapon given to a boy in Middle East (9)
I believe the answer is:
marmalade
'preserve' is the definition.
(marmalade is a kind of preserve)
'weapon given to a boy in middle east' is the subsidiary indication.
'weapon' becomes 'arm' ('arm' can be a synonym of 'weapon').
'given to' says to put letters next to each other.
'boy' becomes 'lad' (lad is a kind of boy**).
'in' is an insertion indicator.
'middle east' becomes 'me'.
'arm'+'a'+'lad'='armalad'
'armalad' going into 'me' is 'marmalade'.
(Other definitions for marmalade that I've seen before include "Preserve made with citrus fruits" , "confiture" , "group?" , "Jame made from citrus fruits" , "Orange preserve" .)