Which ones shot off east? (5)
I believe the answer is:
those
'which ones' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'shot off east?' is the wordplay.
'off' indicates anagramming the letters.
'east?' becomes 'e' ('E' can be a synonym of 'east').
'shot' anagrammed gives 'thos'.
'thos'+'e'='THOSE'
Can you help me to learn more?
(Other definitions for those that I've seen before include "Nostalgic utterance" , "The (things) there" , "the more far out?" , "Plural form of that" , "The ones farther away" .)