Some pest, rodent, made determined progress (6)
I believe the answer is:
strode
'made determined progress' is the definition.
The answer and definition can be both to do with motion as well as being past participle verbs.
Perhaps you can see a link between them that I can't see?
'some pest rodent' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'STRODE' is hidden in the letters of 'pest rodent'.
Can you help me to learn more?
(Other definitions for strode that I've seen before include "went on foot" , "Walked fast with long steps" , "Paced" , "Galumphed" .)