Style of working girl might put on injury cover (5,8)
I believe the answer is:
power dressing
'style of working girl might' is the definition.
The answer and definition are different parts of speech. However, adjectives and past participle verbs sometimes define each other.
'put on injury cover' is the wordplay.
'put on' becomes 'dress' (to dress is to put on clothes).
'injury' becomes 'powering' (I can't explain this - if you can you should believe this answer much more).
'cover' means one lot of letters goes inside another.
'dress' inserted within 'powering' is 'POWER-DRESSING'.
Can you help me to learn more?
(Other definitions for power dressing that I've seen before include "what some businesswomen adopt" , "(Of women) donning clothes to look authoritative" , "Female fashion style designed to give an impression of confidence and efficiency" , "Professional women's fashion style, designed to project authority" , "Wearing of clothes designed to give an impression of authority" .)