Plant’s beginning to hold strike with fear for marine plant (7)
I believe the answer is:
seaweed
'marine plant' is the definition.
(I've seen this in another clue)
'plant's beginning to hold strike with fear' is the wordplay.
'plant's beginning' becomes 'seed' (I've seen this in another clue).
'to hold' indicates putting letters inside.
'strike with fear' becomes 'awe' (I am not sure about this - if you are sure you should believe this answer much more).
'seed' placed around 'awe' is 'SEAWEED'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for seaweed that I've seen before include "Coastal plants" , "Eg, kelp" , "Wrack" , "We eased (anag)" , "Marine plant" .)