Crossword Genius

Writer let tiny letters out with contrition (10)

Ross

I believe the answer is:

penitently

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'contrition' is the definition.
(thesaurus)

'writer let tiny letters' is the wordplay.
'writer' becomes 'pen' (something which writes).
'letters' indicates an anagram.
'let'+'tiny'='lettiny'
'lettiny' is an anagram of 'itently'.
'pen'+'itently'='PENITENTLY'

'out with' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

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I've seen this clue in The Daily Express.
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