Get a bit ill (3)
I believe the answer is:
ail
'ill' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'get a bit' is the wordplay.
'get' is a charade indicator (letters next to each other).
'bit' becomes 'il' (I can't justify this - if you can you should give a lot more credence to this answer).
'a' put next to 'il' is 'AIL'.
Can you help me to learn more?
(Other definitions for ail that I've seen before include "Sicken" , "Afflict -- feel unwell" , "pain" , "Trouble, afflict; be sickly" , "Worry" .)