Story about empty teapot is mere gossip (6)
I believe the answer is:
'mere gossip' is the definition.
'tattle' can be an answer for 'gossip' (I've seen this before). I am not certain of the 'mere' bit.
'story about empty teapot' is the wordplay.
'story' becomes 'tale' (synonyms).
'about' is an insertion indicator.
'empty' suggests removing the centre.
'teapot' with its centre taken out is 'tt'.
'tale' placed around 'tt' is 'TATTLE'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for tattle that I've seen before include "Gossip, idle chatter" , "Tell tales" , "Inform on someone" , "Chatter idly" , "'Gossip, idle talk (6)'" .)