Highland cattle essentially eating one pair of vitamins? (5)
I believe the answer is:
tibet
'highland cattle' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?
'essentially eating one pair of vitamins?' is the wordplay.
'essentially' says to take the centre.
'one pair of vitamins?' becomes 'bet' (I can't explain this - if you can you should believe this answer much more).
The middle letters of 'eating' are 'ti'.
'ti'+'bet'='TIBET'
Can you help me to learn more?
(Other definitions for tibet that I've seen before include "woollen fabric" , "region out East" , "hilly region" , "Mountainous Asian region" , "Dalai Lama's land" .)