The most common and most likely answer to this crossword clue is the 5 letter word THROB
T
H
R
O
B
More clues leading to the result THROB
- Beat bowler initially after return from fielder has missed wicket
- Beat broth that needs a stir
- Confuse after final conversion to British pound
- Thrill – not half – over start of bass beat
- Beat disease suffocating lion losing energy
- Beat poet's last hour on outside broadcast
- Beat extremely thuggish boy
- Heath Robinson checks pulse
- Pound found in bathrobe
- Player ultimately both managed to beat
Buddy explains!

The straight part
We know that "Palpitation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case palpitation = throb.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does THROB mean?
THROB noun- A beating, vibration or palpitation.
- To pound or beat rapidly or violently.
- To vibrate or pulsate with a steady rhythm.
- (of a body part) To pulse (often painfully) in time with the circulation of blood.