Henry in attractive position (5)
I believe the answer is:
niche
'position' is the definition.
(niche is a kind of position)
'henry in attractive' is the wordplay.
'henry' becomes 'H' (symbol for the unit of electrical inductance).
'in' means one lot of letters goes inside another.
'attractive' becomes 'nice' (similar in meaning).
'h' put inside 'nice' is 'NICHE'.
(Other definitions for niche that I've seen before include "comfortable situation" , "small specialised market" , "good spot!" , "Calling" , "Special location" .)