Tea? Good, about to come in before expected time! (4,4)
I believe the answer is:
earl grey
'tea?' is the definition.
(Earl Grey is a type of tea)
'good about to come in before expected time' is the wordplay.
I cannot quite understand how this works, but
'good' could be 'g' (abbreviation) and 'g' is present in the answer.
'about' could be 're' ('re' means regarding or about) and 're' is present in the answer.
'time' could be 'early' (I've seen this in other clues) and 'early' is present in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for earl grey that I've seen before include "Flavoured kind of tea" , "brew" , "A type of China tea flavoured with bergamot" , "Bergamot-flavour tea" , "leaves much to be desired?" .)