Fruit swallowed by some Londoners (5)
I believe the answer is:
melon
'fruit' is the definition.
(type of fruit)
'swallowed by some londoners' is the wordplay.
'MELON' is hidden within the letters.
But, I am uncertain how this is indicated.
Can you help me to learn more?
(Other definitions for melon that I've seen before include "Large sweet gourd" , "Type of pepo" , "Sweet juicy fruit" , "Honeydew fruit" , "Large round fruit" .)