Silly crone halts a lively dance (10)
I believe the answer is:
charleston
'a lively dance' is the definition.
'Charleston' can be an answer for 'dance' (charleston is a kind of dance). I'm not sure about the 'a lively' bit.
'silly crone halts' is the wordplay.
'silly' is an anagram indicator.
'crone'+'halts'='cronehalts'
'cronehalts' anagrammed gives 'CHARLESTON'.
Can you help me to learn more?
(Other definitions for charleston that I've seen before include "American port" , "Lively dance - then carols (anag)" , "Lively 1920s' dance" , "Dance making" , "US city - 1920s' dance" .)