Tantalising person finishes off feat with comfort (5)
I believe the answer is:
tease
'tantalising person' is the definition.
I can't judge whether this defines the answer.
'finishes off feat with comfort' is the wordplay.
'finishes off' suggests the final letters (the letters which finish the words).
'with' is a charade indicator (letters next to each other).
'comfort' becomes 'ease' (synonyms).
The final letter of 'feat' is 't'.
't'+'ease'='TEASE'
Can you help me to learn more?
(Other definitions for tease that I've seen before include "Chaff" , "Comb to remove tangles and open out the fibres" , "Make playful fun of (someone)" , "Banter, provoke gently" , "Vex" .)