Crossword Genius

Entering hotel on river, a provider of accommodation (13)

Ross

I believe the answer is:

boardinghouse

I'm a little stuck... Click here to teach me more about this clue!

'a provider of accommodation' is the definition.
(a boardinghouse provides accommodation)

'entering hotel on river' is the wordplay.
'entering' becomes 'boarding' (boarding is a kind of entering).
'hotel on river' becomes 'house' (I can't justify this - if you can you should believe this answer much more).
'boarding'+'house'='BOARDINGHOUSE'

Can you help me to learn more?

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app