Those moved and left B and B (6)

I believe the answer is:

hostel

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'b and b' is the definition.
I can't judge whether this definition defines the answer.

'those moved and left' is the wordplay.
'moved' indicates an anagram.
'and' means one lot of letters go next to another.
'left' becomes 'L' (common abbreviation).
'those' anagrammed gives 'hoste'.
'hoste'+'l'='HOSTEL'

Can you help me to learn more?

(Other definitions for hostel that I've seen before include "Inexpensive lodging place" , "Cheap lodgings" , "somewhere to kip?" , "Cheap accommodation for traveller or backpacker" , "Cheap place to stay" .)

I've seen this clue in The Mirror.

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