Port worker to deserve getting sacked (9)
I believe the answer is:
stevedore
'port worker' is the definition.
'stevedore' can be an answer for 'worker' (stevedore is a kind of worker). I am unsure of the 'port' bit.
'to deserve getting sacked' is the wordplay.
'getting sacked' indicates anagramming the letters (sack can mean to destroy).
'to'+'deserve'='todeserve'
'todeserve' is an anagram of 'STEVEDORE'.
Can you help me to learn more?
(Other definitions for stevedore that I've seen before include "dock pay for him?" , "he'll have loads on board" , "Worker who loads and unloads ships" , "One loads and unloads ships" , "Hold worker" .)