The most common and most likely answer to this crossword clue is the 8 letter word SALLOWER
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The straight part
We know that "Comparatively anemic" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case comparatively anemic = sallower.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 SALLOWER mean?
SALLOWER adjective- (of skin) Yellowish.
- (of a person) Having skin (especially on the face) of a sickly pale colour.
- (of objects or dim light) Having a similar pale, yellowish colour.
- Dirty; murky.