One of the two living in the disreputable establishment? (5,6)

'one of the two living in the disreputable' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'establishment?' is the wordplay.
I cannot really see how this works, but
'establishment?' could be 'joint' (joint is a kind of establishment) and 'joint' is found within the answer.
The remaining letters 'tenant' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?