Hire tent collapsing? Unlucky for some (8)
I believe the answer is:
thirteen
'unlucky for some' is the definition.
(I've seen this before)
'hire tent collapsing?' is the wordplay.
'collapsing?' indicates anagramming the letters (I've seen 'collapses' mean this).
'hire'+'tent'='hiretent'
'hiretent' anagrammed gives 'THIRTEEN'.
(Other definitions for thirteen that I've seen before include "ill-omened figure" , "Where situation is" , "Supper attendees" , "Number considered unlucky" , "this could be unlucky" .)