Didn’t dwell on its having been transferred to (6,4)
I believe the answer is:
passed over
'didn't dwell on its having been' is the definition.
I can't tell whether this definition defines the answer.
'transferred to' is the wordplay.
'transferred' becomes 'passed' (passing is a kind of transferring).
'to' becomes 'over' (I can't justify this - if you can you should believe this answer much more).
'passed'+'over'='PASSED OVER'
Can you help me to learn more?
(Other definitions for passed over that I've seen before include "Disregarded" , "ignored" , "not taken into consideration" .)