He's of paramount importance in sheep farming (3)
I believe the answer is:
ram
'he's' is the definition.
'paramount importance in sheep farming' is the wordplay.
'RAM' is hidden within the letters.
But, I am not sure how this is indicated.
'of' is the link.
Can you help me to learn more?
(Other definitions for ram that I've seen before include "needed for PC" , "force" , "Pound" , "Drive hard" , "The constellation Aries" .)