11 across
Trade
documentaries
aim
to
leave
without
a
partner
(10)
Trade documentaries aim to leave without a partner (10)
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The definition is at the end of the clue.
How the clue works
The definition is without a partner. Take DOCUMENTARIES and remove the letters of AIM (signalled by 'aim to leave'), which leaves D, O, C, U, E, N, T, R, E, S. 'Trade' tells you to rearrange those ten letters into UNESCORTED. There's no separate anagram indicator, so do the anagram first and then take out AIM.