Leading actor and sailor under suspicion initially (4)
I believe the answer is:
star
'leading actor' is the definition.
(I've seen this before)
'sailor under suspicion initially' is the wordplay.
'sailor' becomes 'tar' (tar is a kind of sailor).
'under' says to put letters next to each other.
'initially' suggests taking the first letters.
The initial letter of 'suspicion' is 's'.
'tar' after 's' is 'STAR'.
'and' is the link.
(Other definitions for star that I've seen before include "Heavenly body - leading actress?" , "Outstanding actor" , "Top performer" , "Celestial point of light" , "Glamorous celebrity" .)