One of many carried by the caddy (3,4)
I believe the answer is:
tea leaf
'one of many carried by the caddy' is the definition.
(a tea caddy carries tea leaves)
'carried by the caddy' is the wordplay.
'carried' becomes 'leaf' (I can't explain this - if you can you should give a lot more credence to this answer).
'by' says to put letters next to each other.
'the caddy' becomes 'tea' (synonyms).
'leaf' put after 'tea' is 'TEA-LEAF'.
Can you help me to learn more?
(Other definitions for tea leaf that I've seen before include "might be spotted in China" , "thief in London" , "one exhibiting a fortune?" , "Cockney crook" , "Ingredient of infusion - thief (rhyming slang)" .)