Pink lady? (7)
This clue is a double definition.
'pink' is the first definition.
(coral is a kind of pink)
'lady?' is the second definition.
(Other definitions for coral that I've seen before include "Marine polyps, often forming reefs" , "Shade of pink" , "Orangey-pink" , "Reef-forming skeletons" , "Reef-forming sea life" .)
(Other definitions for mildred that I've seen before include "Woman" , "Girl" , "lady?" .)