Sturdy person like George or David maybe on strike (5)
I believe the answer is:
stout
'sturdy' is the definition.
('stout' can be a synonym of 'sturdy')
'person like george or david maybe on strike' is the wordplay.
'person like george or david maybe' becomes 'st' (saint).
'on strike' becomes 'out' (I've seen this before**).
'st'+'out'='STOUT'
(Other definitions for stout that I've seen before include "Robust; drink" , "Rather fat, drink" , "drinks?" , "Corpulent" , "Fat - strong" .)