Below are possible answers for the crossword clue Boxer's concern.
REACH
move forward or upward in order to touch; also in a metaphorical sense;
the act of physically reaching or thrusting out
reach a point in time, or a certain state or level;
an area in which something acts or operates or has power or control:
reach a destination, either real or abstract;
the limit of capability;
reach a goal, e.g.,
the limits within which something can be effective;
place into the hands or custody of;
A reach is a length of a stream or river, usually suggesting a level, uninterrupted stretch. The beginning and ending points may be selected for geographic, historical or other reasons.
to gain with effort;
to extend as far as;
be in or establish communication with;
to exert much effort or energy;
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