Determined soldier, for example, behind a barrier (7)
I believe the answer is:
adamant
'determined' is the definition.
(I've seen this before)
'soldier for example behind a barrier' is the wordplay.
'soldier' becomes 'ant' (soldier is a type of ant).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'example behind' becomes 'a' (I can't explain this - if you can you should believe this answer much more).
'a barrier' becomes 'dam' (dam is a kind of barrier).
'a'+'dam'='adam'
'ant' after 'adam' is 'ADAMANT'.
Can you help me to learn more?
(Other definitions for adamant that I've seen before include "Fully determined" , "uncompromising" , "Refusing to be persuaded" , "Completely determined" , "6a [PRINCESS IDA] 's fortress < for unyielding" .)