Office worker set out in storm (7)
I believe the answer is:
tempest
'storm' is the definition.
(I know that storm can be written as tempest)
'office worker set out in' is the wordplay.
'office worker' becomes 'temp' (a temporary office worker).
'out' indicates an anagram (out can mean wrong or inaccurate).
'in' is an insertion indicator.
'set' anagrammed gives 'est'.
'temp' inserted into 'est' is 'TEMPEST'.
(Other definitions for tempest that I've seen before include "A violent storm like Shakespeare's" , "Violent Shakespearian storm" , "An angry storm as in Shakespeare play" , "Bad weather" , "A turbulent storm of wind and rain" .)