Be out to do badly at golf (i.e., make a mess of it) (5)
I believe the answer is:
bodge
'a mess of it' is the definition.
I can't tell whether this definition defines the answer.
'be out to do badly at golf i e' is the wordplay.
'out' means to remove the last letter.
'to' is a charade indicator (letters next to each other).
'badly' indicates anagramming the letters (letters in the wrong order).
'at' means one lot of letters go next to another.
'golf i' becomes 'g' (I am not sure about this - if you are sure you should believe this answer much more).
'be' with its last letter taken off is 'b'.
'do' is an anagram of 'od'.
'b'+'od'+'g'+'e'='BODGE'
'make' acts as a link.
Can you help me to learn more?
(Other definitions for bodge that I've seen before include "Repair clumsily (colloq.)" , "spoiled work" , "Make or repair badly" , "Clumsily repair (something)" , "Unsatisfactory repair" .)