A VIP organised cat shelter ... (8)
I believe the answer is:
pavilion
'shelter' is the definition.
(I know that pavilion is a type of tent)
'a vip organised cat' is the wordplay.
'organised' indicates anagramming the letters.
'cat' becomes 'lion' (lion is a kind of cat).
'a'+'vip'='avip'
'avip' is an anagram of 'pavi'.
'pavi'+'lion'='PAVILION'
(Other definitions for pavilion that I've seen before include "Building on sports ground for players and spectators" , "summerhouse" , "Park shelter" , "Cricket ground clubhouse" , "Large and often sumptuous tent" .)