To me, half London can be at the waterside getting fruit! (5)
I believe the answer is:
melon
'fruit' is the definition.
(I know that melon is a type of fruit)
'to me half london' is the wordplay.
'half' means to take half the letters.
'london' halved is 'lon'.
'me'+'lon'='MELON'
'can be at the waterside getting' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for melon that I've seen before include "I'm very seedy" , "Type of pepo" , "Honeydew fruit" , "Cantaloupe fruit" , "Eg, cantaloupe, galia" .)