The most common and most likely answer to this crossword clue is the 3 plus 4 letter word OAK TREE
O
A
K
T
R
E
E
More clues leading to the result OAK TREE
- A knight in old yard finds Royalist’s sheltering spot?
- Revolutionary takeover overlooking very famous royal hideout
- Symbol of strength after not finishing HR, H’s first loss in 3
- This will produce a corn if fused
- Teak or ebony at first sculpted to produce wooden structure
- Certainly eating a lemon, say, evokes an image of strength
- Over a thousand with no-small Indian woman — a symbol of strength
- A king in Old Testament regarding eastern symbol of strength
- A trek is arranged in borders of Oxfordshire to see part of forest?
Buddy explains!

The straight part
We know that "a symbol of strength" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a symbol of strength = oak tree.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.