The crossword solution for the term 'Beginning for 'TROOPER'' is 'PARA'. The word 'para' is a prefix derived from Greek and Latin, meaning 'beside, near, beyond, or apart'. It is commonly used in English to form words such as 'PARALLEL', 'PARADIGM', and 'PARADOX'. In military terms, it is used to refer to paratroopers, or soldiers who are trained to parachute out of aircraft. Therefore, the answer 'PARA' is an appropriate beginning for the word 'TROOPER'.