Scottish League One? Team's First Division (5)

I believe the answer is:

split

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'division' is the definition.
(I know that division can be written as split)

'scottish league one? team's first' is the wordplay.
'scottish league' becomes 'spl' (I am not sure about this - if you are sure you should believe this answer much more).
'one?' becomes 'i' (Roman numeral).
'team's first' becomes 't' (sst letter of 'team').
'spl'+'i'+'t'='SPLIT'

Can you help me to learn more?

(Other definitions for split that I've seen before include "Chop or divide" , "Sliced < peach" , "Separate, break into parts" , "grass" , "Divorce - Adriatic city" .)

I've seen this clue in The Independent.

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