Son that's bald, but without any worries? (10)
I believe the answer is:
stressless
'without any worries?' is the definition.
('worry' can be 'stress' (I've seen this before) so maybe 'without any worries?' can be ''stressless')
'son that's bald' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'that's bald' becomes 'tressless' (I've seen this in another clue).
's'+'tressless'='STRESSLESS'
'but' acts as a link.
(Other definitions for stressless that I've seen before include "Free from pressure or tension" , "without accent?" .)