Hit out, getting a century and a half (5)
I believe the answer is:
clout
'hit' is the definition.
(I've seen this before)
'out getting a century and a half' is the wordplay.
'getting' is a charade indicator (letters next to each other).
'a century' becomes 'C' (common abbreviation).
'and' means one lot of letters go next to another.
'a half' becomes 'l' (I can't justify this - if you can you should give a lot more credence to this answer).
'c'+'l'='cl'
'out' put after 'cl' is 'CLOUT'.
Can you help me to learn more?
(Other definitions for clout that I've seen before include "Lay one on" , "Cuff" , "Ne'er cast a ... till May be out, it's said" , "piece of clothing" , "strike" .)