Tempting fate like tsar acquiring castle with cash (6,3,7)

'cash' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'tempting fate like tsar acquiring castle' is the wordplay.
I cannot really see how this works, but
'fate' could be 'trouble' (trouble is a kind of fate) and 'trouble' is found within the answer.
'like' could be 'as' and 'as' is found within the answer.
'castle' could be 'r' (abbreviation for rook/castle in chess) and 'r' is found within the answer.
This explanation may well be incorrect...

'with' acts as a link.

Can you help me to learn more?