Provoke park officer giving up right at the start (5)
I believe the answer is:
anger
'provoke park' is the definition.
'anger' can be an answer for 'provoke' (angering is a kind of provoking). I am not certain of the 'park' bit.
'officer giving up right at the start' is the wordplay.
'officer giving up' becomes 'ange' (I can't explain this - if you can you should give a lot more credence to this answer).
'at the start' indicates taking the first letters.
The first letter of 'right' is 'r'.
'ange'+'r'='ANGER'
Can you help me to learn more?
(Other definitions for anger that I've seen before include "Extreme annoyance" , "Nettle" , "Strong feeling of annoyance" , "One of the seven deadly sins" , "Wrath, ire" .)