Carp here, perhaps, to discover dreadful shop inside
I believe the answer is:
fishpond
'carp here perhaps' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'discover dreadful shop inside' is the wordplay.
'discover' becomes 'find' (finding is a kind of discovering**).
'dreadful' indicates anagramming the letters.
'inside' is an insertion indicator.
'shop' anagrammed gives 'shpo'.
'find' placed around 'shpo' is 'FISHPOND'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for fishpond that I've seen before include "quantity of water" , "Where koi carp may live?" .)