It precedes foxtrot in the choreography (4)
I believe the answer is:
echo
'it precedes foxtrot' is the definition.
The definition suggests a singular noun which matches the answer. I also know that 'foxtrot' relates to this answer.
'in the choreography' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ECHO' is hidden within 'the choreography'.
Can you help me to learn more?
(Other definitions for echo that I've seen before include "Comms code word for E" , "Rebounding sound" , "letter we hear" , "Reflection of sound - Greek nymph" , "Sound bouncing back" .)