Oddly Sikh opted for reconstruction of computer (7)
I believe the answer is:
desktop
'computer' is the definition.
(desktop computer is a kind of computer)
'oddly sikh opted for reconstruction' is the wordplay.
'oddly' means one should take alternating letters (letters in the odd-numbered positions are used).
'for reconstruction' indicates anagramming the letters (I've seen this in other clues).
The alternate letters of 'sikh' are 'sk'.
'sk'+'opted'='skopted'
'skopted' with letters rearranged gives 'DESKTOP'.
'of' is the link.
(Other definitions for desktop that I've seen before include "Office work surface" , "where the inkwell used to be?" , "often supports a mass of papers?" , "Work surface; computer type" , "Main working area of PC" .)