Strong? Very much so! (6)
I believe the answer is:
mighty
I believe this is a quadruple definition!!
'strong?' is the first definition.
(thesaurus)
'very' is the second definition.
('mighty' can be a synonym of 'very')
'much' is the third definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I don't see?
'so' is the fourth definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for mighty that I've seen before include "Extremely" , "Strong, powerful" , "Having great strength" , "Powerful and great" , "Powerful - exalted" .)