My pal, Scot, works on the fluid in cells (9)

I believe the answer is:

cytoplasm

I'm a little stuck... Click here to teach me more about this clue!

'on the fluid in cells' is the definition.
I can't tell whether this definition defines the answer.

'my pal scot works' is the wordplay.
'works' is an anagram indicator (work can mean to twist or convulse).
'my'+'pal'+'scot'='mypalscot'
'mypalscot' anagrammed gives 'CYTOPLASM'.

Can you help me to learn more?

(Another definition for cytoplasm that I've seen is " Material in cell".)

I've seen this clue in the Sydney Morning Herald.

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