Is singing it, when all in, terrible? (6)
I believe the answer is:
ballad
'is singing it' is the definition.
I can't judge whether this definition defines the answer.
'all in terrible?' is the wordplay.
'in' indicates putting letters inside.
'terrible?' becomes 'bad' ('bad' can be similar in meaning to 'terrible').
'all' placed within 'bad' is 'BALLAD'.
'when' is the link.
Can you help me to learn more?
(Other definitions for ballad that I've seen before include "Narrative song of popular origin" , "Folk song" , "Love song" , "Slow sentimental song" , "romance" .)