On the quiet, soldiers' rows can be thought funny! (6)
I believe the answer is:
pranks
'rows can be thought funny' is the definition.
I can't judge whether this definition defines the answer.
'on the quiet soldiers'' is the wordplay.
'on' says to put letters next to each other.
'the quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'soldiers'' becomes 'ranks' (rank can mean a group of soldiers in a line).
'p' next to 'ranks' is 'PRANKS'.
Can you help me to learn more?
(Other definitions for pranks that I've seen before include "Jokes, capers" , "Tricks" , "Practical jokes, pieces of mischief" , "Tricky things to play" .)