Drag stalwarts back inside (5)
I believe the answer is:
trawl
'drag' is the definition.
(I've seen this before)
'stalwarts back inside' is the wordplay.
'inside' indicates the answer is hidden within the clue.
'back' says the letters should be written backwards.
'lwart' is hidden in the letters of 'stalwarts'.
'lwart' in reverse letter order is 'TRAWL'.
(Other definitions for trawl that I've seen before include "Long fishing line with many shorter lines and hooks" , "Fishing-net" , "seek suitable candidates" , "Fishermen may use it" , "hunt" .)