Old Brits, perhaps still way to the north (5)
I believe the answer is:
picts
'old brits' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'still way to the north' is the wordplay.
'still' becomes 'pic' (short for picture).
'way' becomes 'st' (abbreviation for street).
'to the north' shows that the letters should be reversed in order (in a down clue, letters go up or 'northward').
'st' backwards is 'ts'.
'pic'+'ts'='PICTS'
'perhaps' is the link.
Can you help me to learn more?
(Other definitions for picts that I've seen before include "Ancient Northerners" , "People living in Scotland in Roman times" .)