Cooked concoction of weeds containing a little tea (6)
I believe the answer is:
stewed
'cooked' is the definition.
(similar in meaning)
'concoction of weeds containing a little tea' is the wordplay.
'concoction of' indicates an anagram (I've seen 'concoction' mean this).
'containing' is an insertion indicator.
'a little' says to take the initial letters.
The first letter of 'tea' is 't'.
'weeds' anagrammed gives 'sewed'.
'sewed' enclosing 't' is 'STEWED'.
(Other definitions for stewed that I've seen before include "Slowly boiled" , "Cooked in hot water" , "felt uneasy" , "Cooked (prunes?)" , "canned" .)