Stood up tall when dragged around the end of the pier (7)
I believe the answer is:
towered
'stood up tall' is the definition.
I can't judge whether this defines the answer.
'dragged around the end of the pier' is the wordplay.
'dragged' becomes 'towed' (towing is a kind of dragging).
'around' indicates putting letters inside.
'the end of' says to take the final letters.
The last letters of 'the pier' are 'er'.
'towed' enclosing 'er' is 'TOWERED'.
'when' is the link.
Can you help me to learn more?
(Other definitions for towered that I've seen before include "Was of great height, . . . . . . . over others" , "Was taller and more eminent than others" , "Loomed (over)" , "rose" .)