The most common and most likely answer to this crossword clue is the 7 letter word PSYCHIC
I've seen this crossword clue in The Daily Telegraph
P
S
Y
C
H
I
C
Buddy explains!
The straight part
We know that "spiritual" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case spiritual = psychic.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 PSYCHIC mean?
PSYCHIC noun- A person who possesses, or appears to possess, extra-sensory abilities such as precognition, clairvoyance and telepathy, or who appears to be susceptible to paranormal or supernatural influence.
- A person who supposedly contacts the dead; a medium.
- (gnosticism) In gnostic theologian Valentinus' triadic grouping of man the second type; a person focused on intellectual reality (the other two being hylic and pneumatic).
- Relating to or having the abilities of a psychic.
- Relating to the psyche or mind, or to mental activity in general.