The most common and most likely answer to this crossword clue is the 5 letter word PLUMB
I've seen this crossword clue in The Daily Telegraph
P
L
U
M
B
More clues leading to the result PLUMB
- Dead weight
- Excellent bass sound
- Test the uprightness of highly desirable bachelor
- Dead plant gone missing
- Fruit bat home? Not in, definitely out
- Born under Victoria, true
- Check the depth exactly
- Fix pipes etc made of lead round Scottish chimney
- Second fruit? Exactly
- Going straight up and down chimney cased in lead
Buddy explains!

The straight part
We know that "Kind of line that's fruity, we hear (" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case kind of line that's fruity, we hear ( = plumb.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 PLUMB mean?
PLUMB noun- A little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction.
- A weight on the end of a long line, used by sailors to determine the depth of water.
- The perpendicular direction or position.
- To determine the depth, generally of a liquid; to sound.
- To attach to a water supply and drain.
- To think about or explore in depth, to get to the bottom of, especially to plumb the depths of.
- To use a plumb bob as a measuring or aligning tool.
- To accurately align vertically or horizontally.
- To seal something with lead.
- To work as a plumber.
- To fall or sink like a plummet.
- To trace a road or track; to follow it to its end.
- To position vertically above or below.
- Truly vertical, as indicated by a plumb line.
- Describing an LBW where the batsman is hit on the pads directly in front of his wicket and should be given out.
- In a vertical direction; perpendicularly.
- Squarely, directly; completely.
- The fruit and its tree.
- Extended senses.