"The Iron Lady” star (6)
I believe the answer is:
streep
'the iron lady star' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for streep that I've seen before include "Inflamed swelling inside" , "Meryl - - (films)" , "See 4 Down" , "Meryl --, Oscar winner" , "[Thespian]" .)