Crisis for most of the workers in New Regency (9)
I believe the answer is:
emergency
'crisis' is the definition.
(emergency is a kind of crisis)
'most of the workers in new regency' is the wordplay.
'most of' means to remove the last letter.
'the workers' becomes 'men' (man is a kind of worker).
'in' means one lot of letters goes inside another.
'new' indicates an anagram.
'men' with its final letter removed is 'me'.
'regency' is an anagram of 'ergency'.
'me' inserted within 'ergency' is 'EMERGENCY'.
'for' is the link.
(Other definitions for emergency that I've seen before include "Urgent need" , "Serious situation requiring immediate action" , "Occurrence demanding immediate remedy" , "A sudden unforeseen crisis" , "Serious situation needing prompt action" .)