Nothing provided by one hostel, strangely, is free (2,3,5)
I believe the answer is:
on the loose
'is free' is the definition.
(similar in meaning)
'nothing provided by one hostel strangely' is the wordplay.
'nothing' becomes 'O' (looks like zero - 0).
'provided by' is a charade indicator (letters next to each other).
'strangely' indicates anagramming the letters.
'one'+'hostel'='onehostel'
'onehostel' with letters rearranged gives 'ntheloose'.
'o'+'ntheloose'='ON THE LOOSE'
(Other definitions for on the loose that I've seen before include "Off the leash" , "Free from confinement" .)