Commanding Officer with power leads a tense movement in the field (6)
I believe the answer is:
cowpat
'movement in the field' is the definition.
The definition suggests a singular noun which matches the answer.
'commanding officer with power leads a tense' is the wordplay.
'commanding officer' becomes 'co'.
'leads' says to take the initial letters.
'tense' becomes 't' (grammatical abbreviation).
The first letters of 'with power' is 'wp'.
'co'+'wp'+'a'+'t'='COWPAT'
Can you help me to learn more?
(Other definitions for cowpat that I've seen before include "Brown deposit in a field?" , "Particular cock" , "Piece of cattle dung" , "'In a field, one might step in one (6)'" , "You don't want to put your foot in it" .)