Bulb lit up when wiggled about (5)
I believe the answer is:
tulip
'bulb' is the definition.
(I've seen this before)
'lit up when wiggled about' is the wordplay.
'lit up' can be anagrammed to 'TULIP'.
But, I am not clear how this is indicated.
Can you help me to learn more?
(Other definitions for tulip that I've seen before include "Bulbous plant" , "(Dutch) bloom" , "Spring-flowering plant" , "Garden flower from bulb" , "Dutch bulb?" .)