Wild rose, presumably red (4)

I believe the answer is:

sore

I'm a little stuck... Click here to teach me more about this clue!

'presumably red' is the definition.
'sore' can be an answer for 'red' (thesaurus). I am not sure about the 'presumably' bit.

'wild rose' is the wordplay.
'wild' indicates anagramming the letters.
'rose' is an anagram of 'SORE'.

Can you help me to learn more?

(Other definitions for sore that I've seen before include "Causing or suffering pain" , "Bruised" , "Raw or annoyed" , "Painful spot" , "Hurting, painful" .)

I've seen this clue in the Evening Standard.

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