At no time turning, go for comeback (2-5)
I believe the answer is:
re-entry
'comeback' is the definition.
(entering or coming back again)
'at no time turning go' is the wordplay.
'at no time' becomes 'ne'er' (poetic variant of 'never').
'turning' is a reversal indicator.
'go' becomes 'try' (both can mean an attempt).
'neer' back-to-front is 'reen'.
'reen'+'try'='RE-ENTRY'
'for' acts as a link.
(Other definitions for re-entry that I've seen before include "Spacecraft's return phase" , "Hitting earth's atmosphere again" , "Spacecraft's return to earth" , "A spacecraft's track coming back into atmosphere" , "Return of a spacecraft to the earth's atmosphere" .)