I like that! Monica embracing Captain Triangle! (9)
I believe the answer is:
isosceles
'triangle' is the definition.
(isosceles triangle is a kind of triangle)
'i like that monica embracing captain' is the wordplay.
I cannot really see how this works, but
'i' is found in the answer.
'like that' could be 'so' (as in 'like so') and 'so' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for isosceles that I've seen before include "Of triangular, with two sides of equal length" , "Describing a triangle with two equal sides" , "(Of triangles) having two sides the same" , "Kind of triangle" , "Triangle with two sides of equal length" .)