Short file, kept by alliance in Somerset, that goes sideways (9)
I believe the answer is:
cartwheel
'short file kept by alliance in somerset that goes sideways' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'short file kept by alliance' is the wordplay.
'short file' becomes 'whe' (I can't justify this - if you can you should give a lot more credence to this answer).
'kept by' means one lot of letters goes inside another.
'alliance' becomes 'cartel' (I've seen this in another clue).
'whe' going within 'cartel' is 'CARTWHEEL'.
Can you help me to learn more?
(Other definitions for cartwheel that I've seen before include "It's performed by acrobat" , "Gymnastic feat" , "to go on the wagon" , "Handspring" , "Revolutionary move" .)