Stiff drinks - they're often sought by darts players (7)
I believe the answer is:
trebles
This clue might be a double definition.
'stiff drinks' is the first definition.
Although both the answer and definition are verbs in their -s form, I don't understand how one could define the other.
'often sought by darts players' is the second definition.
Although both the answer and definition are plural nouns, I cannot understand how they can define each other.
'they're' acts as a link.
Can you help me to learn more?
(Other definitions for trebles that I've seen before include "singers" , "soprano voices" , "More than one choirboy" , "Increase the number" .)