Anyhow, proves to the last to be profligate (9)
I believe the answer is:
overspend
'anyhow proves to the last to be profligate' is the definition.
I can't tell whether this definition defines the answer.
'anyhow proves to the last' is the wordplay.
'anyhow' indicates an anagram.
'to the last' becomes 'end' (I've seen this in another clue).
'proves' is an anagram of 'oversp'.
'oversp'+'end'='OVERSPEND'
Can you help me to learn more?
(Other definitions for overspend that I've seen before include "splurge" , "To exceed one's budget" , "Use too many resources" , "Buy too much" , "Use up too much money" .)