Threw one into an outbuilding (5)
I believe the answer is:
shied
'threw' is the definition.
The definition and answer can be both to do with motion as well as being past participle verbs.
Perhaps you can see an association between them that I can't see?
'one into an outbuilding' is the wordplay.
'one' becomes 'i' (Roman numeral).
'into' means one lot of letters goes inside another.
'an outbuilding' becomes 'shed' (outbuilding in a garden).
'i' put inside 'shed' is 'SHIED'.
Can you help me to learn more?
(Other definitions for shied that I've seen before include "horse did this?" , "Jumped nervously; threw" , "Thrown" , "Flung, tossed" , "started" .)