Lot of Tyneside not completely developed (7)
I believe the answer is:
destiny
'lot' is the definition.
(I've seen this before)
'tyneside not completely developed' is the wordplay.
'not completely' means to remove the last letter.
'developed' indicates anagramming the letters.
'tyneside' with its final letter taken off is 'tynesid'.
'tynesid' anagrammed gives 'DESTINY'.
'of' is the link.
(Other definitions for destiny that I've seen before include "portion" , "Ultimate fate" , "must?" , "The future as arranged by fate" , "Fortune" .)