Here are the possible solutions for thrust producer clue
Answer
Clue
Relevancy
fin
Clue
Thrust producer
Definition
to equip with paddle-like structures
propeller
Clue
Thrust producer
Definition
someone who, or something which, propels, also PROPELLOR
retrorocket
Clue
Thrust producer
Definition
a rocket whose function is to slow down, fired in a direction opposite to that in which a body, e.g. a spacecraft or an artificial satellite, is travelling