Ordering mashed quince in shells of Senegalese nutmeg (10)

'ordering' is the definition.
(sequencing is a kind of ordering)

'mashed quince in shells of senegalese nutmeg' is the wordplay.
'mashed' indicates anagramming the letters.
'in' indicates putting letters inside.
'shells of' suggests removing the centre (I've seen 'shell of' mean this).
'nutmeg' becomes 'ng' (I can't justify this - if you can you should give a lot more credence to this answer).
'senegalese' with its centre removed is 'se'.
'quince' is an anagram of 'quenci'.
'se'+'ng'='seng'
'quenci' put inside 'seng' is 'SEQUENCING'.

Can you help me to learn more?