Fresh tea at the start of lunch, at the last coffee (5)
I believe the answer is:
latte
'coffee' is the definition.
(I've seen this before)
'fresh tea at the start of lunch at the last' is the wordplay.
'fresh' is an anagram indicator.
'at the start of' says to take the initial letters (I've seen 'at the start' mean this).
'the last' says to take the final letters.
The initial letter of 'lunch' is 'l'.
The final letter of 'at' is 't'.
'tea'+'l'+'t'='tealt'
'tealt' is an anagram of 'LATTE'.
(Other definitions for latte that I've seen before include "Espresso added to frothed steamed milk" , "Coffee with a topping of frothed steamed milk" , "Type of coffee" , "Kind of espresso coffee" , "White coffee" .)