Tell tales about the tardy? (6)
I believe the answer is:
relate
'tell tales' is the definition.
(I've seen this in another clue)
'about the tardy?' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'the tardy?' becomes 'late' (I've seen this before).
're'+'late'='RELATE'
(Other definitions for relate that I've seen before include "Recite - marriage guidance organisation" , "Marriage Guidance - report" , "Tell - marriage counsellors" , "link" , "Narrate or associate" .)