The most common and most likely answer to this crossword clue is the 7 letter word SNOWIER
I've seen this crossword clue in The Daily Telegraph
S
N
O
W
I
E
R
Buddy explains!
The straight part
We know that "Having acquired more cover" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case having acquired more cover = snowier.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 SNOWIER mean?
SNOWIER adjective- Marked by snow, characterized by snow.
- Covered with snow, snow-covered, besnowed.
- Snow-white in color, white as snow.