Happy to be led astray about a blend of tea (6)
I believe the answer is:
elated
'happy' is the definition.
(similar in meaning)
'led astray about a blend of tea' is the wordplay.
'astray' indicates anagramming the letters.
'about' indicates putting letters inside.
'a blend of' is an anagram indicator (I've seen this in other clues).
'led' is an anagram of 'eld'.
'tea' anagrammed gives 'ate'.
'eld' placed around 'ate' is 'ELATED'.
'to be' is the link.
(Other definitions for elated that I've seen before include "Filled with joy and pride" , "Intensely delighted and proud" , "In high spirits, very pleased" , "Gleeful" , "On cloud nine" .)