Record terribly neat solo, getting down! (12)
I believe the answer is:
disconsolate
'down' is the definition.
(thesaurus)
'record terribly neat solo' is the wordplay.
'record' becomes 'disc' ('disc' can be a synonym of 'record').
'terribly' indicates anagramming the letters.
'neat'+'solo'='neatsolo'
'neatsolo' is an anagram of 'onsolate'.
'disc'+'onsolate'='DISCONSOLATE'
'getting' is the link.
(Other definitions for disconsolate that I've seen before include "Deeply sad" , "Dejected" , "Very sad or disappointed" , "Sad; beyond comfort" , "Stuck with the blues" .)