For example, potato container brought to queen (5)
I believe the answer is:
tuber
'for example potato' is the definition.
(potato is an example of a tuber)
'container brought to queen' is the wordplay.
I cannot really understand how this works, but
'container' could be 'tub' (tub is a kind of container) and 'tub' is located in the answer.
'queen' could be 'er' (short for Elizabeth Regina ie Queen Elizabeth) and 'er' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for tuber that I've seen before include "Brute or a potato plant" , "Brute (anag)" , "King Edward maybe" , "Underground stem, root" , "Fleshy underground stem (eg of the potato)" .)