The girl turned paler (7)
I believe the answer is:
lighter
'paler' is the definition.
('light' can be similar in meaning to 'pale')
'the girl turned' is the wordplay.
'turned' is an anagram indicator.
'the'+'girl'='thegirl'
'thegirl' is an anagram of 'LIGHTER'.
(Other definitions for lighter that I've seen before include "Fire-raiser" , "Device for igniting cigarette" , "Open boat - spill" , "More manageable" , "Cargo barge; smoker's accessory" .)