Pester the second prince? (5)
I believe the answer is:
harry
'pester' is the definition.
(I've seen this before)
'the second prince?' is the wordplay.
'the second' becomes 'h' (rnd letter of 'the').
'prince?' becomes 'arry' (I can't justify this - if you can you should give a lot more credence to this answer).
'h'+'arry'='HARRY'
Can you help me to learn more?
(Other definitions for harry that I've seen before include "Persistently harass" , "Prince William's younger brother" , "Hound" , "Make repeated attacks on, badger" , "Ravage - pester" .)