Disorganised purser is a turn up for the books (8)

I believe the answer is:

surprise

I'm a little stuck... Click here to teach me more about this clue!

'a turn up for the books' is the definition.
I can't tell whether this defines the answer.

'disorganised purser is' is the wordplay.
'disorganised' indicates an anagram.
'purser'+'is'='purseris'
'purseris' is an anagram of 'SURPRISE'.

Can you help me to learn more?

(Other definitions for surprise that I've seen before include "Take unawares" , "Startle, astonish" , "Unexpected thing" , "Unexpected or astonishing event" , "Something unexpected" .)

I've seen this clue in The Guardian.

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