The birthplace of even Orlando? Port in Clare! (6)
I believe the answer is:
cradle
'the birthplace' is the definition.
('cradle' can be a synonym of 'birthplace')
'even orlando? port in clare' is the wordplay.
'even' means one should take alternating letters (even-numbered letters are used).
'port' becomes 'L' (abbreviation for L - 'port' is 'left' on a boat).
'in' indicates putting letters inside.
'clare' becomes 'ce' (I've seen this in other clues).
The alternating letters of 'orlando' are 'rad'.
'rad'+'l'='radl'
'radl' going inside 'ce' is 'CRADLE'.
'of' acts as a link.
(Other definitions for cradle that I've seen before include "Cot for a small baby" , "Baby's bed" , "early bed" , "situation far from grave" , "'When the bough breaks, the . . . . . . will fall'" .)