Incandescent as the rod might be? (3,3)
I believe the answer is:
red hot
'incandescent' is the definition.
(I've seen this before)
'the rod might be?' is the wordplay.
'might be?' indicates an anagram.
'the'+'rod'='therod'
'therod' with letters rearranged gives 'RED-HOT'.
'as' acts as a link.
(Other definitions for red hot that I've seen before include "Very busy" , "Fiercely glowing" , "with enthusiasm?" , "Extremely exciting" , "Sexy" .)