We shall intend having mixed gin, having good intentions... (4-7)
I believe the answer is:
well-meaning
'having good intentions' is the definition.
I can't judge whether this definition defines the answer.
'we shall intend having mixed gin' is the wordplay.
'we shall' becomes 'well' (we'll).
'intend' becomes 'mean' (synonyms).
'having' is a charade indicator (letters next to each other).
'mixed' indicates an anagram.
'gin' with letters rearranged gives 'ing'.
'well'+'mean'+'ing'='WELL-MEANING'
Can you help me to learn more?
(Another definition for well-meaning that I've seen is " Having good, if sometimes ill-advised, intentions".)