Foreign Office assuming young, unknown soldier will be highly decorated (10)
I believe the answer is:
flamboyant
'highly decorated' is the definition.
'flamboyant' can be an answer for 'decorated' (thesaurus). I'm not certain of the 'highly' bit.
'foreign office assuming young unknown soldier' is the wordplay.
'foreign office' becomes 'FO' (abbreviation).
'assuming' is an insertion indicator (inserted letters are taken in or assumed).
'young' becomes 'lamb' (lamb is a kind of young).
'unknown' becomes 'y' (algebra).
'soldier' becomes 'ant' (soldier ant is a type of ant).
'fo' enclosing 'lamb' is 'flambo'.
'flambo'+'y'+'ant'='FLAMBOYANT'
'will be' acts as a link.
Can you help me to learn more?
(Other definitions for flamboyant that I've seen before include "Exuberant" , "Extravagant" , "Showy" , "Rich" , "Ostentatious, colourful" .)