The appeal of tea at the start of the morning (5)
I believe the answer is:
charm
'the appeal' is the definition.
('charm' can be a synonym of 'appeal')
'tea at the start of the morning' is the wordplay.
'tea' becomes 'char' (I've seen this before).
'at the start of' suggests taking the first letters (I've seen 'at the start' mean this).
The initial letter of 'morning' is 'm'.
'char'+'m'='CHARM'
'of' is the link.
(Other definitions for charm that I've seen before include "Entice" , "Entrance, bewitch" , "Personal attractiveness and charisma" , "Lure" , "Entrance; amulet" .)