Cry, as time short for rejigging study of the universe (14)

I believe the answer is:

astrochemistry

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'rejigging study of the universe' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'cry as time short' is the wordplay.
'cry as time short' can be anagrammed to 'ASTROCHEMISTRY'.
But, I'm not sure how the anagram is indicated.

'for' is the link.

Can you help me to learn more?

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