Judge soldiers retreating, bronze-clad, as enemy within (6)
I believe the answer is:
trojan
'enemy within' is the definition.
I can't judge whether this defines the answer.
'judge soldiers retreating bronze-clad' is the wordplay.
'judge' becomes 'j' (abbreviation for judge).
'soldiers' becomes 'OR' (Other Ranks).
'retreating' is a reversal indicator.
'bronze' becomes 'tan' (both can mean to get a sun tan).
'clad' means one lot of letters goes inside another (clad can mean covered by).
'j'+'or'='jor'
'jor' reversed gives 'roj'.
'roj' going inside 'tan' is 'TROJAN'.
'as' is the link.
Can you help me to learn more?
(Other definitions for trojan that I've seen before include "Proverbially hard worker" , "Computer threat" , "Horse filled with Greek soldiers" , "This horse was a wooden decoy" , "This horse once concealed Greek warriors bent on breaking a siege" .)