A complaint at the apiary? (5)

I believe the answer is:
hives
This clue could be a double definition.
'a complaint' is the first definition.
(I've seen this before)
'the apiary?' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'at' is the link.
Can you help me to learn more?
(Other definitions for hives that I've seen before include "disease" , "Urticaria; bees' homes" , "Bee colonies - nettle rash" , "Eruption" , "Itchy skin; where honey made" .)
