Possible Clues:

• Clerical worker with long hair's a flirt
• With this temperature, in short, she will catch you by the hair in the end
• Supply lock for siren
• Siren time and time again interrupting Catherine II, perhaps
• Femme fatale needs time before perm sets in new style
• Siren, e.g
• Locum office worker with long hair — Eve?
• Part-timers embracing very French charmer
• Siren, say, one that works for a while with lock
• Femme fatale — one working for a time on her hair