Scottish dance? Authentic, we hear (4)
I believe the answer is:
reel
'scottish dance?' is the definition.
(I've seen this before)
'authentic we hear' is the wordplay.
'authentic' becomes 'real' (I've seen this before).
'we hear' indicates a 'sounds like' (homophone) clue.
'real' is a homophone of 'REEL'.
(Other definitions for reel that I've seen before include "Whirl around" , "Photographer's and anglers spool" , "Air" , "Folk dance" , "Fishing rod attachment" .)