Protective wear, more than a couple of lines (7)
I believe the answer is:
overall
'protective wear' is the definition.
'more than a couple of lines' is the wordplay.
'more than' becomes 'over' (I've seen this before).
'couple of' says to double the letters.
'lines' becomes 'l' (this might be a standard abbreviation I've not previously seen).
'l' duplicated is 'll'.
'over'+'a'+'ll'='OVERALL'
(Other definitions for overall that I've seen before include "Omnipotent" , "sweeping?" , "Protective clothing" , "Dress for dirty work" , "Protective outer garment" .)