Judge and trustee in blue missing Sierra find work here? (9)
I believe the answer is:
jobcentre
'find work here?' is the definition.
(a jobcentre helps people find work)
'judge and trustee in blue missing sierra' is the wordplay.
I cannot really understand how this works, but
'judge' could be 'j' (abbreviation for judge) and 'j' is found in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is found in the answer.
'trustee' could be 'tr' (abbreviation) and 'tr' is found in the answer.
This explanation may well be incorrect...
(Other definitions for jobcentre that I've seen before include "Employment exchange" , "Agency for employment" , "Government office displaying adverts for those seeking work" .)