Fail to get lie about something thrown (7)
I believe the answer is:
missile
'something thrown' is the definition.
I can't judge whether this defines the answer.
'fail to get lie about' is the wordplay.
'fail to get' becomes 'miss' (I've seen this in another clue).
'about' indicates an anagram.
'lie' with letters rearranged gives 'ile'.
'miss'+'ile'='MISSILE'
Can you help me to learn more?
(Other definitions for missile that I've seen before include "Military projectile" , "weapon that's fired" , "One could get fired" , "Weapon that is propelled" , "Weapon that's thrown or projected" .)