The most common and most likely answer to this crossword clue is the 7 letter word SEAWEED
I've seen this crossword clue in The Daily Telegraph
S
E
A
W
E
E
D
More clues leading to the result SEAWEED
- Plant we see, a new daffodil initially
- Marine plant ending in trouble in river, was surfacing
- Plant what may grow to inspire wonderment
- Notice allegedly found next to small opening in dense vegetation
- Laver, maybe, put dread into top player
- Regular feature of rooks, origin being about a loch
- Sow eating cow’s food on the beach?
- Algae offspring holds in wonder
- Laver perhaps as selected player held in respect? On the contrary
- Tangle of small spawn noted by Spooner in the Firth?
Buddy explains!
The straight part
We know that "Main plant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case main plant = seaweed.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 SEAWEED mean?
SEAWEED noun- Any of numerous marine plants and algae, such as a kelp.