Former PM endlessly surrounded by regularly stark gossip (7)
I believe the answer is:
tattler
'gossip' is the definition.
(tattler can mean a gossip)
'former pm endlessly surrounded by regularly stark' is the wordplay.
'former pm' becomes 'Attlee' (prime minister Clement Attlee).
'endlessly' means to remove the last letter.
'surrounded by' means one lot of letters goes inside another.
'regularly stark' becomes 'tr' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'attlee' with its final letter removed is 'attle'.
'attle' placed into 'tr' is 'TATTLER'.
Can you help me to learn more?
(Other definitions for tattler that I've seen before include "gossip" , "Chatterer" , "One who gossips" .)