What you were singing in the shower? (5,5)
I believe the answer is:
water music
'what you' is the definition.
I can't judge whether this defines the answer.
'singing in the shower?' is the wordplay.
I cannot quite see how this works, but
'singing' could be 'music' (singing is a type of music) and 'music' is present in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
This explanation may well be incorrect...
'were' is the link.
Can you help me to learn more?
(Other definitions for water music that I've seen before include "collection of orchestral movements" , "Novel" , "handle work on the radio!" .)