One’s known for charging in, interrupting character from Greece (5)
I believe the answer is:
rhino
'one's known for charging' is the definition.
I can't judge whether this definition defines the answer.
'in interrupting character from greece' is the wordplay.
'interrupting' is an insertion indicator.
'character from greece' becomes 'rho' (Greek letter).
'in' put within 'rho' is 'RHINO'.
Can you help me to learn more?
(Other definitions for rhino that I've seen before include "Endangered species of large horned herbivore" , "Hi, Ron! (anag)" , "Endangered wildlife" , "Moola" , "old money?" .)