She may turn paler (5)
I believe the answer is:
pearl
'she' is the definition.
'turn paler' is the wordplay.
'turn' indicates an anagram.
'paler' anagrammed gives 'PEARL'.
'may' is the link.
(Other definitions for pearl that I've seen before include "See 12" , "something highly valued" , "Precious stone from shellfish" , "Lustrous structure in a mollusc shell" , "Smooth lustrous round structure of calcium carbonate" .)