Pause blood group therapy - in the end, it soothes kids (7)
I believe the answer is:
lullaby
'it soothes kids' is the definition.
The definition suggests a singular noun which matches the answer.
'pause blood group therapy in the end' is the wordplay.
'pause' becomes 'lull' (lull is a kind of pause).
'blood group' becomes 'AB' (AB is an example).
'in the end' suggests the final letters.
The final letter of 'therapy' is 'y'.
'lull'+'ab'+'y'='LULLABY'
Can you help me to learn more?
(Other definitions for lullaby that I've seen before include "Soothing song for infants" , "Soporific song" , "Song to send one to sleep" , "Song to send a child asleep" , "Gentle song to put baby to sleep" .)