Old Greek sailor makes a goat run off (8)
I believe the answer is:
argonaut
'old greek sailor' is the definition.
'argonaut' can be an answer for 'sailor' (I have seen 'Classical sailor' mean 'argonaut' so perhaps 'sailor' could also mean 'argonaut'). I'm not certain of the 'old greek' bit.
'a goat run off' is the wordplay.
'off' is an anagram indicator.
'goat'+'run'='goatrun'
'goatrun' is an anagram of 'rgonaut'.
'a'+'rgonaut'='ARGONAUT'
'makes' is the link.
Can you help me to learn more?
(Other definitions for argonaut that I've seen before include "One of those who sailed with Jason to find the Golden Fleece" , "Ancient mariner" , "One of Jason's crew" , "legendary sailor" , "Member of Jason's crew" .)