The most common and most likely answer to this crossword clue is the 12 letter word WITHSTANDING
W
I
T
H
S
T
A
N
D
I
N
G
More clues leading to the result WITHSTANDING
Buddy explains!
The straight part
We know that "Strongly resisting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case strongly resisting = withstanding.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 WITHSTANDING mean?
WITHSTANDING verb- To resist or endure (something) successfully.
- To oppose (something) forcefully.