Femme fatale, very French, surrounded by some office workers? (9)
I believe the answer is:
temptress
'femme fatale' is the definition.
(I know that femme fatale can be written as temptress)
'very french surrounded by some office workers?' is the wordplay.
'very french' becomes 'tres' ('very' in French).
'surrounded by' is an insertion indicator.
'some office workers?' becomes 'temps' (I can't explain this - if you can you should believe this answer much more).
'tres' going inside 'temps' is 'TEMPTRESS'.
Can you help me to learn more?
(Other definitions for temptress that I've seen before include "charmer" , "Enticing female" , "Siren, say" , "Alluring woman" , "seductive type" .)