Like the accent of an apprentice at the Space Administration (5)
I believe the answer is:
nasal
'like the accent' is the definition.
I can't tell whether this definition defines the answer.
'of an apprentice at the space administration' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'apprentice' becomes 'L' (as in a learner driver with L-plates on their car).
'at' means one lot of letters go next to another (I've seen this in other clues).
'the space administration' becomes 'sa' (this might be a standard abbreviation of which I'm unaware).
'an' with letters rearranged gives 'na'.
'l' after 'sa' is 'sal'.
'na'+'sal'='NASAL'
Can you help me to learn more?
(Other definitions for nasal that I've seen before include "Concerning the nose" , "description of Alain's vowels" , "regarding the nose" , "old face-saver" , "Like some spray" .)