100 are released without worries (8)

I believe the answer is:

carefree

'without worries' is the definition.
(I've seen this before)

'100 are released' is the wordplay.
'100' becomes 'c' (Roman numeral).
'released' becomes 'free' (similar in meaning).
'c'+'are'+'free'='CAREFREE'

(Other definitions for carefree that I've seen before include "Jaunty" , "Without responsibility or worries" , "Take a chair" , "Free from anxiety or responsibility" , "without worrying?" .)

I've seen this clue in The Sun.

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