Crossword Genius

Parse clues, highlighting every other cell (5)

Ross

I believe the answer is:

ascus

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

'cell' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for ascus that I've seen is " cell".)

I've seen this clue in The Independent.
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