Crossword Genius

Points to strange remedy (5)

Ross

I believe the answer is:

serum

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

'remedy' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'points to strange' is the wordplay.
'points' becomes 'se'.
'to strange' becomes 'rum' (synonyms).
'se'+'rum'='SERUM'

Can you help me to learn more?

(Other definitions for serum that I've seen before include "potential shot in the arm?" , "Antitoxin derived from blood" , "Constituent of blood" , "Watery fluid from animal tissue" , "Muser in blood" .)

I've seen this clue in The Mirror.
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