To be a little sleepy could be worse, having a dizzy head (6)
I believe the answer is:
drowse
'to be a little sleepy' is the definition.
I can't tell whether this defines the answer.
'could be worse having a dizzy head' is the wordplay.
'could be' is an anagram indicator.
'having' is a charade indicator (letters next to each other).
'head' suggests taking the first letters.
The first letter of 'dizzy' is 'd'.
'worse'+'d'='worsed'
'worsed' is an anagram of 'DROWSE'.
Can you help me to learn more?
(Other definitions for drowse that I've seen before include "Nod" , "Snooze" , "Doze, be half asleep" , "feel sleepy" , "Feel dozy" .)