rooted clone developes something weird REP4RESPONSE

hey riu, i have this clone and its rooted well and has been growing very nicely but just yesterday i noticed that 1 of the leaves, not the tip of it but the side half way down it is turning the leaf this brownish colour its quite small, i dont see any bugs or anything, i gave it a mild fert a few days ago for the first time, but it doesn't look like nute burn, i can supply a picture if that will help, its the only clone of this strain that i have and i really dont want to lose it.
any help would be great

Picture??...........

Here is a picture!! i hope anyone someone can help me!! before it gets worse!! im growing under T5's for a full details click my signature for my current grow thats includes this clone.

Thats just natural die off,watch your nutes when they are young and you will be fine,...........peace

Really? okay awesome thats a good thing lol, yea i gave it a weak solution, not gonna feed it until it starts looking like a plant , its got some funky leaves goin on lol

My clones allways loose a few of the leaves through the struggle of takeing back off growing again.I usually just trim those few dead leaves as they yellow...peace

Some clones grow mutant leaves during early growth,nothing to worry about there..peace

thanks for all your help man +rep forsure bro