Hiding a black heart, the villain has a tough time (3,3)

'a tough time' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'hiding a black heart the villain' is the wordplay.
'hiding' means one lot of letters goes inside another.
'heart' indicates the central letters.
'the villain' becomes 'baddy' (bad guy in a story).
The middle of 'black' is 'a'.
'a' put into 'baddy' is 'BAD DAY'.

'has' acts as a link.

Can you help me to learn more?