Lyres are terribly sharp (5)
I believe the answer is:
harps
'lyres' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'terribly sharp' is the wordplay.
'terribly' indicates anagramming the letters.
'sharp' anagrammed gives 'HARPS'.
'are' acts as a link.
Can you help me to learn more?
(Other definitions for harps that I've seen before include "Dwells" , "Musical instruments of sharp kind" .)