The most common and most likely answer to this crossword clue is the 7 letter word LINSEED
I've seen this crossword clue in The Times
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More clues leading to the result LINSEED
- Oil producer’s lies end badly
- Oil used by batsmen in Leeds, perhaps?
- Cycle seen covered in top type of oil
- Flaxen stuff, looking old, covering ends of settee
- Type of oil processed in Leeds
- Treatment for bats without vision, though not initially about to use eyes?
- Diesel manufactured including new source of oil
- Sort of oil possibly seen in holiday centre
- Can’t see? Remove top, see inside, it’s full of oil
- Oil producer makes our stock market break into a song
Buddy explains!

The straight part
We know that "Oil producer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case oil producer = linseed.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 LINSEED mean?
LINSEED noun- The seed of the flax plant, which yields linseed oil.