The most common and most likely answer to this crossword clue is the 7 letter word DRAGGED
I've seen this crossword clue in Financial Times
D
R
A
G
G
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D
More clues leading to the result DRAGGED
Buddy explains!

The straight part
We know that "Was boring" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case was boring = dragged.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 DRAGGED mean?
DRAGGED verb- To pull along a surface or through a medium, sometimes with difficulty.
- To move onward heavily, laboriously, or slowly; to advance with weary effort; to go on lingeringly.
- To act or proceed slowly or without enthusiasm; to be reluctant.
- To draw along (something burdensome); hence, to pass in pain or with difficulty.
- To serve as a clog or hindrance; to hold back.
- To move (an item) on the computer display by means of a mouse or other input device.
- (chiefly of a vehicle) To unintentionally rub or scrape on a surface.
- To hit or kick off target.
- To fish with a dragnet.
- To search for something, as a lost object or body, by dragging something along the bottom of a body of water.
- To break (land) by drawing a drag or harrow over it; to harrow.
- To search exhaustively, as if with a dragnet.
- To roast, say negative things about, or call attention to the flaws of (someone).
- To perform as a drag queen or drag king.