Decorated ace meets two men face-to-face (7)
I believe the answer is:
adorned
'decorated ace' is the definition.
'adorned' can be an answer for 'decorated' ('adorn' can be a synonym of 'decorate'). I'm unsure of the 'ace' bit.
'meets two men face-to-face' is the wordplay.
'two men' can mean two substitutions for 'man'.
'meets' is a charade indicator (letters next to each other).
'man' becomes 'N' (knight, a man in chess).
'man' becomes 'ed' (short for Edward).
'face-to-face' becomes 'ador' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'n'+'ed'='ned'
'ned' put after 'ador' is 'ADORNED'.
Can you help me to learn more?
(Other definitions for adorned that I've seen before include "Decorated, bedecked" , "Embellished, decorated" , "Bedecked while Don read" , "done up" , "Put on finery" .)