Ghost hunter caught lots, not finished after a year (3-3)

'a year' is the definition.
I know nothing about this answer so I can't judge whether this works.

'ghost hunter caught lots not finished' is the wordplay.
'ghost hunter' becomes 'pa' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'caught' becomes 'c' (cricket abbreviation).
'lots' becomes 'many' (many means lots of something).
'not finished' means to remove the last letter.
'many' with its final letter taken off is 'man'.
'pa'+'c'+'man'='PAC-MAN'

'after' acts as a link.

Can you help me to learn more?