Barnaby periodically comes to Berkshire village (4)
I believe the answer is:
bray
'berkshire village' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'barnaby periodically' is the wordplay.
'periodically' indicates alternate letters (letters must be selected 'every so often').
The alternate letters of 'barnaby' are 'BRAY'.
'comes to' is the link.
Can you help me to learn more?
(Other definitions for bray that I've seen before include "Animal's call" , "Donkey call" , "Harsh noise" , "time-serving cleric's place" , "Donkey's sound" .)