Corny, maybe, but unsuited to vegetarians (3)

I believe the answer is:

ham

I'm a little stuck... Click here to teach me more about this clue!

If this is the answer I cannot explain how the clue works.

(Other definitions for ham that I've seen before include "under twenty-eight [HIP]" , "An actor who overdoes it in meaty way" , "Noah's second son - a bad actor?" , "Upper leg meat" , "Meat for actor who overdoes it" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app