Points to strange remedy (5)
I believe the answer is:
'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).
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" .)