Arguing with fake Twitter user over a manual bank transfer facility? (6,4)
I believe the answer is:
rowing boat
'manual bank transfer facility?' is the definition.
'arguing with fake twitter user over a' is the wordplay.
'arguing' becomes 'rowing' (I've seen this before).
'with' means one lot of letters go next to another.
'fake twitter user' becomes 'bot'.
'over' is an insertion indicator.
'bot' placed around 'a' is 'boat'.
'rowing'+'boat'='ROWING-BOAT'
(Other definitions for rowing boat that I've seen before include "Maybe eight" , "Small vessel propelled by oars" .)