Pulse up, seductive salsa ends (3)
I believe the answer is:
pea
'pulse' is the definition.
(I know that pea is a type of pulse)
'up seductive salsa ends' is the wordplay.
'ends' says to take the final letters.
The final letters of 'up seductive salsa' are 'PEA'.
(Other definitions for pea that I've seen before include "Annual climbing plant with edible seeds" , "Leguminous seed" , "It grows in 23 Down" , "Leguminous plant" , "Legume" .)