Brief moment tucking into spicy sauce heartlessly – and pastry (6)
I believe the answer is:
samosa
'pastry' is the definition.
(I know that samosa is a type of pastry)
'brief moment tucking into spicy sauce heartlessly' is the wordplay.
'brief moment' becomes 'mo' (as in 'just a mo'; 'brief' asks for an abbreviation).
'tucking into' means one lot of letters goes inside another.
'spicy sauce' becomes 'salsa' (I've seen this before).
'heartlessly' says to hollow out the word (remove centre letters).
'salsa' with its centre taken out is 'sasa'.
'mo' put within 'sasa' is 'SAMOSA'.
'and' acts as a link.
(Other definitions for samosa that I've seen before include "savoury pastry" , "Savoury turnover" , "Small Indian pastry of meat or vegetables" , "tasty snack" , "Asian food" .)