The most common and most likely answer to this crossword clue is the 8 letter word RELATIVE
I've seen this crossword clue in The Daily Telegraph
R
E
L
A
T
I
V
E
More clues leading to the result RELATIVE
- Single verse cutting about deceased kinsman
- Perhaps aunt, about 50, tense, missing daughter
- Dependent on tablet — necessary to get up
- Corresponding with one of the family
- Recall clutching at dad?
- Correspondent blue, vital errors penned in review
- Dad, maybe, about to raise crucial point
- Comparable processes I reveal around opening of trial
- Run on yarn from the east I have for auntie, possibly
- Member of family corresponding
Buddy explains!

The straight part
We know that "Member of family/corresponding" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case member of family/corresponding = relative.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 RELATIVE mean?
RELATIVE noun- Someone in the same family; someone connected by blood, marriage, or adoption.
- A type of adjective that inflects like a relative clause, rather than a true adjective, in certain Bantu languages.
- Connected to or depending on something else; comparative.
- (of a URL, URI, path, or similar) Expressed in relation to another item, rather than in complete form.
- (grammar) That relates to an antecedent.
- Having the same key but differing in being major or minor.
- Relevant; pertinent; related.
- Capable to be changed by other beings or circumstance; conditional.