Brassed off retired man made noise like pig crossing lake (11)
I believe the answer is:
disgruntled
'crossing lake' is the definition.
Both the definition and answer are adjectives. Perhaps there's an association between them I don't understand?
'brassed off retired man made noise like pig' is the wordplay.
I cannot really understand how this works, but
'retired' could be 'r' (abbreviation) and 'r' is present in the answer.
'man' could be 'gun' and 'gun' is located in the remaining letters.
'made' could be 'led' (leading is a kind of making) and 'led' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for disgruntled that I've seen before include "Sulking" , "Unhappy" , "Angry or dissatisfied" , "Sulky" , "Cheesed off" .)