Quietly lied about being neatly arranged (5)
I believe the answer is:
piled
'neatly arranged' is the definition.
'quietly lied about' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'about' is an anagram indicator.
'lied' is an anagram of 'iled'.
'p'+'iled'='PILED'
'being' acts as a link.
(Other definitions for piled that I've seen before include "Heaped" , "Arranged in stacks" , "put in a heap" .)