Publish record on waste (8)
I believe the answer is:
disclose
'publish' is the definition.
(thesaurus)
'record on waste' is the wordplay.
'record' becomes 'disc' (eg a CD, compact disc).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'waste' becomes 'lose' (I've seen this in another clue).
'disc'+'lose'='DISCLOSE'
(Other definitions for disclose that I've seen before include "Betray" , "Divulge, reveal" , "Report" , "broadcast" , "Lay bare" .)