Friend has a turn crossing motorway (5)
I believe the answer is:
amigo
'friend' is the definition.
(thesaurus)
'a turn crossing motorway' is the wordplay.
'turn' becomes 'go' (a person's move in a board game**).
'crossing' means one lot of letters goes inside another.
'motorway' becomes 'mi' (resembles Mg, English motorway).
'a'+'go'='ago'
'ago' placed around 'mi' is 'AMIGO'.
'has' acts as a link.
(Other definitions for amigo that I've seen before include "Friend from Spain?" , "Friend in Spanish-speaking areas" , "friend in Uruguay" , "Mexican friend" , "Spanish word meaning friend" .)