Rehearses riddles (6)
I believe the answer is:
drills
This clue could be a double definition.
'rehearses' is the first definition.
Although both the answer and definition are verbs in their -s form, I cannot understand how one could define the other.
'riddles' is the second 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?
Can you help me to learn more?
(Other definitions for drills that I've seen before include "they bore" , "Potato rows" , "Bores in army exercises" , "Boring tools" , "Tools with a sharp points for making holes" .)