Scribble second slow movement (6)
I believe the answer is:
scrawl
'scribble' is the definition.
(I know that scribble can be written as scrawl)
'second slow movement' is the wordplay.
'second' becomes 's' (common abbreviation).
'slow movement' becomes 'crawl' (I've seen this before).
's'+'crawl'='SCRAWL'
(Other definitions for scrawl that I've seen before include "Write untidily" , "Write in slovenly manner" , "Hurried writing" , "Write poorly, bad handwriting" , "Write carelessly or sloppily" .)