Runway model failed having initially ignored rules (8)
I believe the answer is:
airfield
'runway' is the definition.
(planes take off using a runway on an airfield)
'model failed having initially ignored rules' is the wordplay.
'model' is an anagram indicator.
'having' is an insertion indicator.
'initially' suggests taking the first letters.
The initial letters of 'ignored rules' is 'ir'.
'failed' with letters rearranged gives 'afield'.
'afield' enclosing 'ir' is 'AIRFIELD'.
(Other definitions for airfield that I've seen before include "Landing/take-off area" , "Landing strip" , "where flights are on offer" , "Flying base" , "Aniseed aperitif" .)