One examining person putting funds in about aid grant oddly absent (12)
I believe the answer is:
investigator
'one examining person putting funds' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'about aid grant oddly absent' is the wordplay.
'about' is an insertion indicator.
'oddly' means one should take alternating letters (letters in odd-numbered positions).
'absent' becomes 'investor' (I can't justify this - if you can you should believe this answer much more).
'aid'+'grant'='aidgrant'
The alternate letters of 'aidgrant' are 'igat'.
'igat' going into 'investor' is 'INVESTIGATOR'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for investigator that I've seen before include "Detective" , "One making a search or enquiry" , "Private eye" , "who may be on the prowl?" , "One making a search or enquiries" .)