Source of penicillin doctor pulled out of odd places (5)
I believe the answer is:
mould
'source of penicillin' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'doctor pulled out of odd places' is the wordplay.
I cannot quite see how this works, but
'doctor' could be 'mo' (medical officer) and 'mo' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for mould that I've seen before include "Must" , "Influence" , "die?" , "jelly?" , "Penicillin was discovered in this" .)