The most common and most likely answer to this crossword clue is the 7 letter word ALECOST
I've seen this crossword clue in The Times
A
L
E
C
O
S
T
More clues leading to the result ALECOST
- Strange tales about firm that once flavoured beer
- Beer firm vacated Stockport plant
- Large green stone beneath a plant
- Guinness for one presented by east German plant
- Beer firm evacuated Southport plant
- Tales spread about company that once flavoured beer
- Growth involving green shoots that rose after the budget!
- Price of beer from the plant
- Plant giving a closet a new look
Buddy explains!

The straight part
We know that "plant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case plant = alecost.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 ALECOST mean?
ALECOST noun- The plant costmary (Tanacetum balsamita), which was formerly much used for flavouring ale.