Smiled widely having support (6)
I believe the answer is:
beamed
This clue might be a double definition.
'smiled widely' is the first definition.
'beamed' can be an answer for 'smiled' (beaming is a kind of smiling). I am unsure of the 'widely' bit.
'having support' is the second definition.
(beam is a type of architectural support)
Can you help me to learn more?
(Other definitions for beamed that I've seen before include "Smiled broadly like sun's ray" , "Smiled broadly - positively shone" , "Shone brightly or smiled widely" , "Smiled brightly like sun ray" , "Smiled broadly and warmly" .)