Bit of a lump, very soft, in water (5,5)
I believe the answer is:
adams apple
'bit of a lump' is the definition.
I know that 'lump' relates to this answer.
'soft in water' is the wordplay.
'soft' becomes 'pp' (musical abbreviation for pianissimo).
'in' is an insertion indicator.
'water' becomes 'adam's ale' (humorous term for water).
'pp' going within 'adamsale' is 'ADAMS APPLE'.
'very' is the link.
Can you help me to learn more?
(Other definitions for adams apple that I've seen before include "Thyroid cartilage projection in throat" , "Neck lump" , "Gardener's fruit" , "Charactistic of a man" , "one shows swallowing motion" .)