Tehran’s ready to turn up in support of feminine talent (5)
I believe the answer is:
flair
'talent' is the definition.
(I know that flair is a type of talent)
'tehran's ready to turn up in support of feminine' is the wordplay.
'tehran's ready' becomes 'rial' (I am not sure about this - if you are sure you should believe this answer much more).
'to turn up' says the letters should be written in reverse.
'in support of' means one lot of letters go next to another (in a down clue, some letters hold up others).
'feminine' becomes 'f' (abbreviation listed in Chambers).
'rial' in reverse letter order is 'lair'.
'lair' put after 'f' is 'FLAIR'.
Can you help me to learn more?
(Other definitions for flair that I've seen before include "Creative brilliance" , "Stylishness; talent" , "gift" , "Natural ability or elegance" , "Taste" .)