New stars never cross (10)
I believe the answer is:
transverse
'cross' is the definition.
('transverse' can be a synonym of 'cross')
'new stars never' is the wordplay.
'new' indicates anagramming the letters.
'stars'+'never'='starsnever'
'starsnever' is an anagram of 'TRANSVERSE'.
(Other definitions for transverse that I've seen before include "Cross" , "Situated across something" , "go in 6 ac [CRISSCROSS]" , "Crossing" , "Extending across something" .)