The most common and most likely answer to this crossword clue is the 8 letter word BEEFCAKE
I've seen this crossword clue in Financial Times
B
E
E
F
C
A
K
E
More clues leading to the result BEEFCAKE
- Muscular men mostly backed fee being revised
- Hunk of sweetmeat?
- Jersey, say, and coat, for muscly guys
- Adonis lowers bar
- Gateau served with red meat in hunks
- Baked item: first complaint to brawny men
- Hunk beginning to collapse in imitation of worker?
- Hunk of meat followed by pudding?
- Muscle-bound man with complaint going west of Madeira, say
Buddy explains!

The straight part
We know that "muscly guys" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case muscly guys = beefcake.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 BEEFCAKE mean?
BEEFCAKE noun- Imagery of one or more muscular, well-built men.
- Such a male, especially as seen as physically desirable.