The most common and most likely answer to this crossword clue is the 6 letter word FEEBLY
F
E
E
B
L
Y
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The straight part
We know that "Said to be weekly" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case said to be weekly = feebly.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 FEEBLY mean?
FEEBLY adverb- In a feeble manner.