Cryptic crossword clue
Hitcher's gal rummaged for some bright illumination 11

The most common and most likely answer to this crossword clue is the 11 letter word SEARCHLIGHT

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Buddy explains!

The straight part
We know that "some bright illumination" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case some bright illumination = searchlight.
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 SEARCHLIGHT mean?

SEARCHLIGHT noun
  1. A light source that projects a bright beam of light in any direction, generally for military use.
  2. The light from the above source.
SEARCHLIGHT verb
  1. To scan or sweep across like a searchlight.

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