A spinner, I see, much talked about (5)
I believe the answer is:
topic
'much talked about' is the definition.
I can't tell whether this definition defines the answer.
'a spinner i see' is the wordplay.
'a spinner' becomes 'top' (a spinning top).
'see' becomes 'C' (the word for the letter, according to Chambers).
'top'+'i'+'c'='TOPIC'
Can you help me to learn more?
(Other definitions for topic that I've seen before include "Subject matter of a conversation or discussion" , "Content of argument" , "Question" , "That may be debatable" , "one discussed" .)