Hero for example discharged from Roman army (4)
I believe the answer is:
lion
'hero' is the definition.
(lion can mean a brave person)
'discharged from roman army' is the wordplay.
I cannot really see how this works, but
'from' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
The remaining letters 'lin' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'for example' acts as a link.
Can you help me to learn more?
(Other definitions for lion that I've seen before include "Touring rugby player" , "Buddhist scripture; Sanskrit rule" , "British RU cap" , "Leo" , "The -, the Witch and the Wardrobe" .)