Shows preference for the soft chunks (6)
I believe the answer is:
plumps
'shows preference for' is the definition.
The definition and answer can be both to do with motion as well as being verbs in their -s form.
Maybe there's an association between them I don't understand?
'soft chunks' is the wordplay.
'soft' becomes 'p' (musical abbreviation for 'piano').
'chunks' becomes 'lumps' ('lump' can be a synonym of 'chunk').
'p'+'lumps'='PLUMPS'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for plumps that I've seen before include "Gives support to or drops abruptly" , "Drops or chooses abruptly" , "Makes a choice or drops abruptly" .)