The most common and most likely answer to this crossword clue is the 7 letter word WHEREAS
W
H
E
R
E
A
S
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The straight part
We know that "however" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case however = whereas.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 WHEREAS mean?
WHEREAS noun- A clause, as in legal documents, stating whereas.
- Where (that).
- In contrast; whilst on the contrary; although.
- It being the fact that; inasmuch as. (Often used in recitals)