Frequently short of Turkish capital (3)
I believe the answer is:
oft
'frequently' is the definition.
(I've seen this before)
'of turkish capital' is the wordplay.
'capital' indicates taking the first letters.
The first letter of 'turkish' is 't'.
'of'+'t'='OFT'
'short' is the link.
(Other definitions for oft that I've seen before include "Frequently, as the poet would have it" , "Many times, to the poet" , "Many times (archaic)" , "Quite frequently, according to the poet" , "time and again in literature" .)