Where there's said to be a queue (3)
I believe the answer is:
kew
'where there's said to be a queue' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for kew that I've seen before include "part of London" , "Location of the Royal Botanic Gardens in London" , "Botanic gardens site" , "Garden location" , "SW London Gardens" .)