Odd characters in? I got that Greek one (4)
I believe the answer is:
iota
'greek one' is the definition.
The answer and definition can be both quantities as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'odd characters in? i got that' is the wordplay.
'odd characters in?' indicates alternate letters (I've seen 'odd characters in' mean this (the letters at odd-numbered positions)).
'i'+'got'+'that'='igotthat'
The alternate letters of 'igotthat' are 'IOTA'.
Can you help me to learn more?
(Other definitions for iota that I've seen before include "letter from abroad" , "(Not one) little bit" , "Tiny or scarcely detectable amount" , "Smidgen" , "Ninth Greek character" .)