One with digital expertise traps idiot at work (10)

I believe the answer is:

podiatrist

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'one with digital expertise' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

'traps idiot at work' is the wordplay.
'at work' indicates anagramming the letters.
'traps'+'idiot'='trapsidiot'
'trapsidiot' is an anagram of 'PODIATRIST'.

Can you help me to learn more?

(Other definitions for podiatrist that I've seen before include "Chiropodist" , "I do feel a heel!" , "Treater of foot disorders" .)

I've seen this clue in The Independent.

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