The most common and most likely answer to this crossword clue is the 11 letter word APHRODISIAC
I've seen this crossword clue in The Times
A
P
H
R
O
D
I
S
I
A
C
More clues leading to the result APHRODISIAC
- One will turn on radio chap is altering
- The other driver on move in Cairo is a PhD
- Love potion from Asia? Orchid crossed with poppy, primarily
- Admitting nothing in crash, I paid out for the other driver
- Choir paid as somehow promoting love
- Aid ship orca damaged, which arouses those chasing it
- Stimulating bar in a pub is where march goes
- . Independent involved in chap’s radio broadcast – stimulating stuff
- Admitting nothing in crash I paid off the other driver
- One encouraging the other
Buddy explains!

The straight part
We know that "Love potion" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case love potion = aphrodisiac.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 APHRODISIAC mean?
APHRODISIAC noun- Something, generally a food or drug, having such an effect.
- Arousing or intensifying sexual desire.