She uses oils in her makeup (4)
I believe the answer is:
lois
'she' is the definition.
'oils in her makeup' is the wordplay.
'oils' anagrams to 'LOIS'.
Though, I am unsure how the anagram is indicated.
'uses' acts as a link.
Can you help me to learn more?
(Other definitions for lois that I've seen before include "Superman's girlfriend" , "Woman" , "- Lane, girlfriend of Superman" , "- Lane (Superman's girl)" , "- Lane, Daily Planet reporter" .)