A second cup of this coffee? (7)
I believe the answer is:
instant
This might be a double definition.
'a second' is the first definition.
(I know that second can be written as instant)
'cup of this coffee?' is the second definition.
'instant' can be an answer for 'coffee?' (instant coffee). I'm not sure about the 'cup of this' bit.
Can you help me to learn more?
(Other definitions for instant that I've seen before include "like some coffee?" , "Moment - this month" , "No need to cook" , "Happening immediately" , "Occurring with no delay" .)