One with funds role errs, a true shambles (9)

I believe the answer is:

treasurer

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

'one with funds role' is the definition.
I can't tell whether this definition defines the answer.

'errs a true shambles' is the wordplay.
'shambles' indicates an anagram.
'errs'+'a'+'true'='errsatrue'
'errsatrue' with letters rearranged gives 'TREASURER'.

Can you help me to learn more?

(Other definitions for treasurer that I've seen before include "Club official" , "Finance expert" , "Person holding purse" , "Finance officer" , "one safeguarding funds" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app