Playing the last quiet movement (7)
I believe the answer is:
stealth
'quiet movement' is the definition.
'stealth' can be an answer for 'movement' (I have seen 'Surreptitious movement' mean 'stealth' so perhaps 'movement' could also mean 'stealth'). I'm not sure about the 'quiet' bit.
'playing the last' is the wordplay.
'playing' indicates an anagram.
'the'+'last'='thelast'
'thelast' anagrammed gives 'STEALTH'.
Can you help me to learn more?
(Other definitions for stealth that I've seen before include "By which taxes go up" , "Unseen machination" , "Quiet or secret way of behaviour" , "Low-visibility military technology" , "Skill in furtive activity" .)