He herded the animals right into the port (6)
I believe the answer is:
drover
'he herded the animals' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'right into the port' is the wordplay.
'right' becomes 'r' (common abbreviation).
'into' indicates putting letters inside.
'the port' becomes 'dover' (I've seen this before).
'r' put within 'dover' is 'DROVER'.
Can you help me to learn more?
(Other definitions for drover that I've seen before include "I bring along many animals" , "One driving cattle" , "Man who herds cattle" , "Rural worker" , "Person guiding animals to market" .)