Unlucky figure tangles their net (8)
I believe the answer is:
thirteen
'unlucky figure' is the definition.
'thirteen' can be an answer for 'figure'. I am not certain of the 'unlucky' bit.
'tangles their net' is the wordplay.
'tangles' indicates an anagram (I've seen 'tangled' mean this).
'their'+'net'='theirnet'
'theirnet' is an anagram of 'THIRTEEN'.
Can you help me to learn more?
(Other definitions for thirteen that I've seen before include "Number at Last Supper" , "ill-omened figure" , "Supper attendees" , "13" , "Number considered unlucky" .)