One of those triumphant figures on a hill (6)
I believe the answer is:
victor
'one of those' is the definition.
I can't tell whether this definition defines the answer.
'triumphant figures on a hill' is the wordplay.
'triumphant figures' becomes 'vic' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'on' means one lot of letters go next to another.
'a hill' becomes 'tor' (tor is a kind of hill).
'vic'+'tor'='VICTOR'
Can you help me to learn more?
(Other definitions for victor that I've seen before include "The . . . . . . comic with Alf Tupper" , "winning player" , "Meat; complain" , "Comms code for V" , "Conqueror" .)