Never managed to turn at end of runway (4)
I believe the answer is:
nary
'never' is the definition.
(I've seen this before)
'managed to turn at end of runway' is the wordplay.
'managed' becomes 'ran' (both can mean organised or was in charge of).
'to turn' says the letters should be written backwards.
'at end of' indicates one should take the final letters.
The last letter of 'runway' is 'y'.
'ran' in reverse letter order is 'nar'.
'nar'+'y'='NARY'
(Other definitions for nary that I've seen before include "Not in America" , "Not spoken over there" , "Never (a)" .)