The most common and most likely answer to this crossword clue is the 8 letter word RADIATED
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The straight part
We know that "sent out" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sent out = radiated.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 RADIATED mean?
RADIATED verb- To extend, send or spread out from a center like radii.
- To emit rays or waves.
- To come out or proceed in rays or waves.
- To illuminate.
- To expose to ionizing radiation, such as by radiography.
- To manifest oneself in a glowing manner.
- (ecology, intransitive) to spread into new habitats, migrate.
- Radiating from a center; having rays or parts diverging from a center; radiated.
- Surrounded by rays, such as the head of a saint in a religious picture.
- Having parts radiating from the center, like the petals in many flowers.
- Consisting of a disc in which the florets are tubular.
- Having radial symmetry, like a seastar.
- Belonging to the Radiata.