The most common and most likely answer to this crossword clue is the 2 plus 6 letter word ON DEMAND
I've seen this crossword clue in Independent
O
N
D
E
M
A
N
D
More clues leading to the result ON DEMAND
- Single chap died embracing daughter as requested
- Blonde man dyes locks whenever required
- Against getting called back to Germany whenever required
- Working in addition to supporting Democrat whenever required
- Available when needed, but moaned about empty neighbourhood
- Done fantastically by fellow, finished finally when asked for
- Named don working whenever required
- . Work done by this guy at the start of day when required
Buddy explains!
The straight part
We know that "whenever required" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case whenever required = on demand.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.