When in the collapsing shed, makes a run for it (6)
I believe the answer is:
dashes
'a run for it' is the definition.
I can't judge whether this definition defines the answer.
'when in the collapsing shed' is the wordplay.
'when' becomes 'as'.
'in' means one lot of letters goes inside another.
'the collapsing' indicates an anagram.
'shed' with letters rearranged gives 'dhes'.
'as' going into 'dhes' is 'DASHES'.
'makes' is the link.
Can you help me to learn more?
(Other definitions for dashes that I've seen before include "Quick run or sudden rush" , "hares" , "Long signals in Morse code" , "flies!" , "Strokes" .)