Crossword Genius

Anxious sheep following that bloke (3,2)

Ross

I believe the answer is:

het up

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'anxious' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

'sheep following that bloke' is the wordplay.
'sheep' becomes 'tup' (tup is a kind of sheep).
'following' means one lot of letters go next to another.
'that bloke' becomes 'he' ('he' refers to a man).
'tup' after 'he' is 'HET UP'.

Can you help me to learn more?

(Other definitions for het up that I've seen before include "Upset, agitated" , "On edge - agitated" , "Angry - agitated" , "Overwrought" , "Angry - excited" .)

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