Chat about following in taxi (6)
I believe the answer is:
confab
'chat about following in taxi' is the definition.
'confab' can be an answer for 'chat' ('confab' can be a synonym of 'chat'). I am not certain of the 'about following in taxi' bit.
'chat about following in taxi' is the wordplay.
'chat about' becomes 'on' (I am not sure about this - if you are sure you should believe this answer much more).
'following' becomes 'f' (used when citing page numbers etc).
'in' means one lot of letters goes inside another.
'taxi' becomes 'cab' ('cab' can be a synonym of 'taxi').
'on'+'f'='onf'
'onf' inserted into 'cab' is 'CONFAB'.
Can you help me to learn more?
(Other definitions for confab that I've seen before include "Exchange" , "casual conversation" , "jaw" , "Chat (informal)" , "Talk informally" .)