Spartan clothing you and I had again (7)
I believe the answer is:
austere
'spartan' is the definition.
(synonyms)
'clothing you and i had again' is the wordplay.
'clothing' indicates putting letters inside (some letters cover up or clothe others).
'you and i' becomes 'us'.
'had' becomes 'ate' (e.g. I had an ice cream).
'again' becomes 're'.
'us' going inside 'ate' is 'auste'.
'auste'+'re'='AUSTERE'
(Other definitions for austere that I've seen before include "Stark" , "Sure eat up and become without luxury" , "Abstemious and grave" , "Grim - USA tree (anag)" , "Stern or very plain" .)