Moved a lot? VIP critical? (7)
I believe the answer is:
pivotal
'critical?' is the definition.
(I've seen this before)
'moved a lot? vip' is the wordplay.
'moved' indicates an anagram.
'a'+'lot'+'vip'='alotvip'
'alotvip' is an anagram of 'PIVOTAL'.
(Other definitions for pivotal that I've seen before include "Central - decisive" , "Key" , "Of central importance" , "Of crucial importance" , "Crucial, critical" .)