Engineers attempt to draw in space for part of astronaut's mission (2-5)
I believe the answer is:
re-entry
'part of astronaut's mission' is the definition.
The definition suggests a singular noun which matches the answer.
'engineers attempt to draw in space' is the wordplay.
'engineers' becomes 're' (Royal Engineers).
'attempt to' becomes 'try' (I've seen this in other clues).
'draw in' is an insertion indicator.
'space' becomes 'en' (in printing, a space as wide as a letter 'n').
're'+'try'='retry'
'retry' going around 'en' is 'RE-ENTRY'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for re-entry that I've seen before include "Spacecraft's return to earth" , "Return of a spacecraft to the earth's atmosphere" , "A spacecraft's track coming back into atmosphere" , "Spacecraft's return phase" , "Return from outer space" .)