Highland cattle essentially eating one pair of vitamins? (5)
I believe the answer is:
'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'.
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" .)