Solitude not so bad? One may get weak (6)
I believe the answer is:
dilute
'weak' is the definition.
('dilute' can be similar in meaning to 'weak')
'solitude not so bad?' is the wordplay.
'not' suggests deleting specific letters.
'bad?' is an anagram indicator (I've seen 'bad' mean this).
'solitude' with 'so' taken out is 'litude'.
'litude' anagrammed gives 'DILUTE'.
'one may get' acts as a link.
(Other definitions for dilute that I've seen before include "Add water to another liquid" , "Make (a liquid) thinner" , "Adulterate" , "Reduce in strength or concentration" , "not neat" .)