The most common and most likely answer to this crossword clue is the 5 letter word BRAWN
I've seen this crossword clue in The Guardian
B
R
A
W
N
More clues leading to the result BRAWN
- In Scotland, finely dressed knight’s muscularity
- Beef not cooked in rind of bacon
- Strength of one designed to lift opponents with hands
- Fine Scottish knight's physical strength
- Health food to eat with bulk
- Strength of some grain containing whiskey
- Wife nestling into husky thing’s muscle
- Meat dish, uncooked, put in empty basin
- Might underwear widen on vacation?
- Wife’s tucked into healthy stuff to eat, producing muscle
Buddy explains!

The straight part
We know that "Strength" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case strength = brawn.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 BRAWN mean?
BRAWN noun- Strong muscles or lean flesh, especially of the arm, leg or thumb.
- Physical strength; muscularity.
- Head cheese; a terrine made from the head of a pig or calf; originally boar's meat.
- A boar.
- Make fat, especially of a boar.
- Become fat, especially of a boar.