Cow in the Punjab, a shorthorn (5)
I believe the answer is:
abash
'cow' is the definition.
(I've seen this in another clue)
'in the punjab a shorthorn' is the wordplay.
'in' says the answer is hidden in the clue.
'ABASH' is hidden within 'punjab a shorthorn'.
(Other definitions for abash that I've seen before include "Cause someone to feel embarrassed" , "Bring shame on" , "Make embarrassed or ashamed" , "Crush" , "Affront" .)