Show about meat (6)
I believe the answer is:
reveal
'show' is the definition.
(I know that reveal is a more specific form of the action show)
'about meat' is the wordplay.
'about' becomes 're' (regarding).
'meat' becomes 'veal' (veal is a kind of meat).
're'+'veal'='REVEAL'
(Other definitions for reveal that I've seen before include "Expose or display" , "'Disclose, divulge (6)'" , "window, in part" , "Tell the truth" , "Divulge; make visible" .)