Strong enough to be a porter (5)
I believe the answer is:
stout
'a porter' is the definition.
(synonyms)
'strong enough to' is the wordplay.
I cannot quite understand how this works, but
'to' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'be' is the link.
Can you help me to learn more?
(Other definitions for stout that I've seen before include "Fat; dependable" , "Resolute" , "Rather fat, stocky" , "tipple" , "Bulky" .)