The most common and most likely answer to this crossword clue is the 8 letter word GREENISH
I've seen this crossword clue in The Times
G
R
E
E
N
I
S
H
More clues leading to the result GREENISH
Buddy explains!
The straight part
We know that "fairly committed to environment" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fairly committed to environment = greenish.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 GREENISH mean?
GREENISH adjective- Somewhat green.