Presumably pink is her colour (7)

I believe the answer is:

mildred

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'presumably pink' is the definition.
The definition suggests a singular noun which matches the answer.

'her colour' is the wordplay.
'her' becomes 'mild' (I can't explain this - if you can you should believe this answer much more).
'colour' becomes 'red' (red is a kind of colour).
'mild'+'red'='MILDRED'

'is' is the link.

Can you help me to learn more?

(Other definitions for mildred that I've seen before include "Woman" , "lady?" , "Girl" .)

I've seen this clue in The Globe and Mail.

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