Pastry later baked in test of speed? (7)
I believe the answer is:
tartlet
'pastry' is the definition.
(tartlet is a kind of pastry)
'later baked in test of speed?' is the wordplay.
'baked' is an anagram indicator.
'in' means one lot of letters goes inside another.
'test of speed?' becomes 'tt' (I can't explain this - if you can you should believe this answer much more).
'later' anagrammed gives 'artle'.
'artle' going inside 'tt' is 'TARTLET'.
Can you help me to learn more?
(Other definitions for tartlet that I've seen before include "little cake" , "fare" , "little sweet pastry" , "Small quiche" , "Food" .)