Christie's starts to auction goods, I see, over time (6)
I believe the answer is:
agatha
'christie's' is the definition.
(I've seen this in another clue)
'starts to auction goods i see over time' is the wordplay.
'starts to' says to take the initial letters.
'i see' becomes 'aha' (both are said after realising something).
'over' is an insertion indicator.
'time' becomes 't' (abbreviation).
The initial letters of 'auction goods' is 'ag'.
'aha' going around 't' is 'atha'.
'ag'+'atha'='AGATHA'
(Other definitions for agatha that I've seen before include "Detective story writer" , "Woman" , "-- Christie, English novelist" , "Girl" , "Writer who created Hercule Poirot, . . . . . . Christie" .)