New set finds record expensive (5)
I believe the answer is:
steep
'expensive' is the definition.
(I've seen this in another clue)
'new set finds record' is the wordplay.
'new' indicates an anagram.
'finds' means one lot of letters go next to another.
'record' becomes 'EP' (abbreviation for extended play record).
'set' with letters rearranged gives 'ste'.
'ste'+'ep'='STEEP'
(Other definitions for steep that I've seen before include "Almost perpendicular" , "Precipitous - exorbitant" , "Sharply inclined" , "Sheer, precipitous" , "Unreasonably dear - soak" .)