The most common and most likely answer to this crossword clue is the 7 letter word FATBACK
F
A
T
B
A
C
K
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The straight part
We know that "Porky hunk" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case porky hunk = fatback.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does FATBACK mean?
FATBACK noun- A layer of fat, along the back of a pig, used as a cut of meat or to make lard
- A fish, the menhaden.