Old fraud in business, having time for Buddhism? (8)

'old fraud' is the definition.
'cozenage' can be an answer for 'fraud' (cozenage is a kind of fraud). I'm unsure of the 'old' bit.

'business having time for buddhism?' is the wordplay.
'business' becomes 'co' (short for company).
'having' is a charade indicator (letters next to each other).
'time' becomes 'age' (an age is a period of time).
'for' says to put letters next to each other (I've seen this in other clues).
'buddhism?' becomes 'zen' (Zen is an example).
'age' put after 'zen' is 'zenage'.
'co' put next to 'zenage' is 'COZENAGE'.

'in' acts as a link.

Can you help me to learn more?