Flier on the motorway to Gateshead (3)
I believe the answer is:
mig
'flier' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'on the motorway to gateshead' is the wordplay.
'on' means one lot of letters go next to another.
'the motorway' becomes 'MI' (resembles M1, English motorway).
'to gateshead' becomes 'g' (head letter of 'gates').
'mi' next to 'g' is 'MIG'.
Can you help me to learn more?
(Other definitions for mig that I've seen before include "Russian aircraft" , "Russian fighter plane" .)