Huge photo transmitted online? (4)
I believe the answer is:
epic
'huge' is the definition.
(I've seen this before)
'photo transmitted online?' is the wordplay.
I cannot quite see how this works, but
'photo' could be 'pic' (short for picture) and 'pic' is present in the answer.
'online?' could be 'e' (as in e-mail or e-commerce) and 'e' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for epic that I've seen before include "Blown up" , "Ben Hur, say" , "A long poem or book with adventurous theme" , "Nonsense, rubbish" , "Long literary work about great events" .)