Talk about expense vouchers? (8)
I believe the answer is:
chitchat
'talk about expense vouchers?' is the definition.
'chitchat' can be an answer for 'talk' (I've seen this before). I am not sure about the 'about expense vouchers?' bit.
'talk about expense vouchers?' is the wordplay.
'talk' becomes 'chat' (I've seen this before).
'about' means one lot of letters go next to another.
'expense vouchers?' becomes 'chit' (I can't justify this - if you can you should believe this answer much more).
'chat' put after 'chit' is 'CHITCHAT'.
Can you help me to learn more?
(Other definitions for chitchat that I've seen before include "Inconsequential talk" , "Gossip" , "Idle nattering" , "Informal talk" , "Idle talk" .)