Cross star - ever in trouble (8)
I believe the answer is:
traverse
'cross' is the definition.
('traverse' can be a synonym of 'cross')
'star ever in trouble' is the wordplay.
'in trouble' is an anagram indicator.
'star'+'ever'='starever'
'starever' is an anagram of 'TRAVERSE'.
(Other definitions for traverse that I've seen before include "get across" , "Cross sideways" , "Go across" , "Move across" , "Ski diagonally across (a slope)" .)