Prop entirely losing line for seconds in rugby formation (7)
I believe the answer is:
fulcrum
'prop' is the definition.
(I've seen this in another clue)
'entirely losing line for seconds in rugby formation' is the wordplay.
I cannot quite understand how this works, but
'line' could be 'l' (used when specifying particular lines from a poem) and 'l' is located in the answer.
'rugby' could be 'ru' and 'ru' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for fulcrum that I've seen before include "Point against which a lever rests" , "prop" , "Pivotal point" , "Support; fixed point for a lever" , "The point on which a lever turns" .)