Dt Poser

[shandon18]

Clue is 'Activity on board revolutionary ship' (5)
I have c-e-s
Can't get 'chess' out of my mind, but can't make it fit.
Help pls. Suspect I'm going to feel dumb on this one.
Submitted this earlier but doesn't appear to have hit the system.

[Captain2]

revolutionary = CHE = SS= sHIP

[dannyk13]

Chess - Che(Guevara) +ss(ship

[Mamyalynne]

Che (Guevara) on SS (Ship)

[geevo]

Chess, activity on board

CHE SS

[Captain2]

Meant to put Che Guevara of course