The most common and most likely answer to this crossword clue is the 9 letter word ENDLESSLY
I've seen this crossword clue in Independent
E
N
D
L
E
S
S
L
Y
More clues leading to the result ENDLESSLY
Buddy explains!
The straight part
We know that "all the time" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case all the time = endlessly.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 ENDLESSLY mean?
ENDLESSLY adverb- In an endless manner; continuously without limit.