Coming from spaceship to LEM you see stargazer (7)
I believe the answer is:
ptolemy
'stargazer' is the definition.
(Ptolemy is an example)
'coming from spaceship to lem you' is the wordplay.
'coming from' indicates a hidden word.
'PTOLEMY' is hidden within 'spaceship to lem you'.
'see' is the link.
(Other definitions for ptolemy that I've seen before include "Egyptian king or astronomer" , "Alexandrian astronomer" , "Egyptian ruler; Greek astronomer" , "Ancient astronomer" , "Greek astronomer; Greco-Egyptian ruler" .)