Straw bedding absorbs litres more wee (7)

I believe the answer is:

littler

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'more wee' is the definition.
Both the answer and definition are comparative adjectives. Perhaps they are linked in a way I don't understand?

'straw bedding absorbs litres' is the wordplay.
'straw' becomes 'litter' (littering is a kind of strawing).
'bedding' is an insertion indicator.
'absorbs litres' becomes 'l' (I can't explain this - if you can you should believe this answer much more).
'litter' going around 'l' is 'LITTLER'.

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(Other definitions for littler that I've seen before include "Comparatively minor" , "Relatively small" .)

I've seen this clue in The Independent.

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