About a hundred Scandinavians make trips (6)
I believe the answer is:
dances
'trips' is the definition.
(I've seen this before)
'about a hundred scandinavians' is the wordplay.
'about' is an insertion indicator.
'a hundred' becomes 'C' (Roman numeral).
'scandinavians' becomes 'danes' (I've seen this before).
'c' put into 'danes' is 'DANCES'.
'make' is the link.
(Other definitions for dances that I've seen before include "Eg, waltzes, tangos, etc" , "Can-can, cha-cha etc" , "Ascend (anag)" , "Balls" , "Set movements to music" .)