He follows movements of stock closely (6)
I believe the answer is:
drover
This clue could be a double definition.
'he follows movements' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'stock closely' is the second definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'of' acts as a link.
Can you help me to learn more?
(Other definitions for drover that I've seen before include "One driving flock to market" , "Herder of cattle" , "Herdsman" , "One driving cattle" , "Man who herds cattle" .)