The most common and most likely answer to this crossword clue is the 7 letter word NEPOTIC
I've seen this crossword clue in The Daily Telegraph
N
E
P
O
T
I
C
More clues leading to the result NEPOTIC
- Advancing relatives turn up gaping and twitching
- Relatively favourable
- Grass in 4 cut poorly, favouring 4?
- Showing favouritism, notice changes seizing power
- Relatively helpful?
- Having favourites, relatively speaking
- Favouring blood to write about, I see
- Partial towards grass cutting — awfully nice!
- Relatively favourable tip once dubious
Buddy explains!
The straight part
We know that "Relatively helpful" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case relatively helpful = nepotic.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.