Extravagant vendors keep up record and go over budget (9)
I believe the answer is:
overspend
'go over budget' is the definition.
Although both the answer and definition are verbs in their base form, I don't understand how they can define each other.
'extravagant vendors keep up record' is the wordplay.
'extravagant' is an anagram indicator (I've seen this in other clues).
'keep' indicates putting letters inside.
'up' says the letters should be written in reverse (in down clue: letters go upwards).
'record' becomes 'EP' (abbreviation for extended play record).
'ep' back-to-front is 'pe'.
'vendors' with letters rearranged gives 'oversnd'.
'oversnd' placed around 'pe' is 'OVERSPEND'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for overspend that I've seen before include "Buy too much" , "To exceed one's budget" , "Excessive outlay" , "To run into debt" , "Use too many resources" .)