Prime attraction showing prime cut, perhaps (4)
I believe the answer is:
meat
'prime cut perhaps' is the definition.
(prime cut of meat)
'prime attraction showing' is the wordplay.
'showing' indicates the answer is hidden within the clue (the answer is shown in the clue).
'MEAT' is hidden in the letters of 'prime attraction'.
(Other definitions for meat that I've seen before include "17 [ESSENCE]" , "Spam, ham, lamb etc" , "Flesh for eating" , "Animal flesh as food" , "Chops, steaks etc" .)