10 across
Experimental
area:
year
in
this
removing
one’s
perplexity
(9)
Experimental area: year in this removing one’s perplexity (9)
hints
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The definition is at the end of the clue.
How the clue works
perplexity at the end is your definition — a labyrinth being a maze, a source of confusion. For the wordplay, take LAB (experimental area), then YR (year), then IN, and finally TH, which is this with one's (i.e. IS) removed — string all four together and you've got it.