Archer quickly comprehends flight technology (9)
I believe the answer is:
aerospace
'technology' is the definition.
(I have seen 'Technology of flight ' mean 'aerospace' so perhaps 'technology' could also mean 'aerospace')
'archer quickly comprehends flight' is the wordplay.
I cannot really see how this works, but
'archer' could be 'eros' (I've seen this before) and 'eros' is located in the answer.
'quickly' could be 'apace' (synonyms) and 'apace' is found 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 aerospace that I've seen before include "Branch of technology including aviation" , "Nasa's speciality" , "Technology of planes, rockets, etc" , "The aviation world" , "zone near Earth" .)