Intrusion that sees new stars possessing sixth sense (8)
I believe the answer is:
trespass
'intrusion' is the definition.
(synonyms)
'new stars possessing sixth sense' is the wordplay.
'new' is an anagram indicator.
'possessing' means one lot of letters goes inside another.
'sixth sense' becomes 'esp' (I've seen this in other clues).
'stars' anagrammed gives 'trass'.
'trass' enclosing 'esp' is 'TRESPASS'.
'that sees' acts as a link.
(Other definitions for trespass that I've seen before include "Enter land without permission" , "Enter another's property without permission" , "Intrude on another's property" , "Commit a sin -- spa's rest (anag)" , "Transgress" .)