'Cheap digs', opined resentful Spooner (9)

I believe the answer is:

bedsitter

'cheap digs' is the definition.

I cannot understand how the rest of the clue works.

(Other definitions for bedsitter that I've seen before include "pad" , "One-roomed accommodation" , "Modest accommodation" , "Digs" .)

I've seen this clue in The Guardian.

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