Few items show humour (3)
I believe the answer is:
wit
'humour' is the definition.
(I know that humour can be written as wit)
'few items show' is the wordplay.
'show' indicates a hidden word.
'WIT' is hidden in the letters of 'few items'.
(Other definitions for wit that I've seen before include "Repartee" , "Nous" , "Intelligence; humorous person" , "Drollery" , "Intelligence; humorist" .)