It may dissolve regularly, having water all round (4)
I believe the answer is:
isle
'water all round' is the definition.
The definition and answer can be both natural objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'it may dissolve regularly' is the wordplay.
I cannot really understand how this works, but
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found within the answer.
The remaining letters 'isl' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'having' is the link.
Can you help me to learn more?
(Other definitions for isle that I've seen before include "___ of Dogs, Man or Skye" , "Little land" , "Man, Wight, etc" , "Detached place" , "Land amid water" .)